|“Control time . . . control EVERYTHING!”|
|— Krux and Acronix|
Krux is one of the two current (and powerless) Elemental Masters of Time. He is the older twin brother of Acronix. Once a proud Elemental Master, Krux and his brother betrayed the Elemental Masters due to them believing that their element was the strongest. In response, their former allies forged a set of weapons that absorbed the twins' elements. Krux and Acronix were lost to the Temporal Vortex, but Krux managed to escape.
For the next forty years, Krux conspired to strike back against Wu and Ninjago. As he awaited his brother's return, he bred an army of Vermillion snakes, and took on an alias as a museum curator, Dr. Sander Saunders. He also kidnapped Ray and Maya so they could mold armor for the Vermillion, and build a time-traveling weapon, the Iron Doom. When Acronix finally returned, Krux had Cyrus Borg captured so he could complete the Iron Doom's construction. With Wu out of the action, the Ninja struggled to fight Krux, his brother, and their Serpentine army.
Ultimately, the Iron Doom was completed, and Krux traveled back in time to defeat the original Elemental Masters. Using their Dragon, Kai and Nya made a final effort to thwart his plans. When the Iron Doom traveled into the future, Wu removed the Reversal Time Blade from the weapon, and it was lost in the Time Vortex. Though Kai and Nya escaped, Krux was lost along with his brother and Wu.
Forty years prior to the events of Hands of Time, Krux and his brother Acronix were the original Elemental Masters of Time. While Acronix could go forward in time and slow down time, Krux could go back in time and pause time completely. He used these powers to great advantage; going back in time seconds before an opponent could make a move and turning the battle in his favor.
After the Serpentine were defeated by the Elemental Alliance, Krux and Acronix, knowing that they were more powerful than the other Elemental Masters, decided to betray the alliance and use their powers to control all of Ninjago. The other Elemental Masters fought against Krux and Acronix, but the two proved too powerful. With the Time Blades forged by Ray and Maya, Wu and Garmadon fought a lengthy battle against the Time Twins at the Monastery of Spinjitzu. Eventually, Wu and Garmadon used the Time Blades to absorb Krux and Acronix's elemental powers, rendering them normal men.
Knowing that the power to control time was dangerous, Wu and Garmadon used the Time Blades to open a vortex that would leave the Time Blades lost forever. However, Krux and Acronix decided to go through the vortex themselves, which left the two "lost to time."
While Acronix would be lost in the time vortex for 40 years, Krux was somehow immediately teleported back to Ninjago, along with the Reversal Time Blade. Krux then took on the false identity of Dr. Sander Saunders and used eggs from the Great Devourer to breed an army. Krux's army would need weapons and armor, and he knew exactly who could make them. Under the disguise of Dr. Saunders, Krux took his time to become a trusted friend of Ray and Maya. One day, Krux revealed his true identity to the Masters of Fire and Water, and threatened to harm Kai and Nya should they refuse to do his bidding.
Falling asleep following his battle with Clouse, Wu would be stricken with a horrible nightmare of many visions of the future, most notably the return of Krux and Acronix.
As Dr. Saunders, he greeted the Ninja when they arrived at the Ninjago Museum of History, with Kai being a little amused by his name before he gave them a tour of the new Hall of Villainy exhibit as well as showed them the Yin Blade. Later that night, Dr. Saunders was present at the Day of the Departed concert with Dareth. After Dareth defeated the resurrected Kozu and his Stone Warriors, Dr. Saunders expressed extreme displeasure at the damange to his museum caused by the conflict.
When the Ninja were called to the museum to help clean up the damage from the night before, Dr. Saunders became hysterical when he realized that his thermostat had been destroyed. When the Ninja questioned Dr. Saunders about why his thermostat was so important, he simply claimed that the museum needed to be kept at a certain temperature to preserve the exhibits.
After the Ninja took back the BorgWatch prototype from Pythor, they used it to repair the original thermostat. Dr. Saunders was happy that his thermostat was working again, but expressed his dislike for modern technology. Zane then noticed an ancient-looking watch that Dr. Saunders kept in the museum, and Dr. Saunders said that he used the watch to tell time for many years. After the Ninja left, Dr. Saunders listened to the humming sound coming from the museum basement.
Still disguised as Dr. Saunders, Krux was in the Ninjago Museum of History and presented the Ninja with refreshments after they helped clean up the museum, telling them it is pickled beet tea, causing them, expect Jay to not drink them. The Ninja questioned him about a painting that had both Wu and Garmadon in their younger years fighting two mysterious warriors at the Monastery of Spinjitzu. Dr. Saunders claimed that the painting was a myth, explaining that the Time Twins was merely a "folktale," explaining that they had the power to control time itself.
While looking at his watch sometime after the Ninja left, he was confronted by Acronix. After taking off his moustache, he revealed that "Dr. Saunders" was just a disguise Krux took on before hugging his brother.
At his lair in the museum, Krux was extremely annoyed by his brother's growing fondness for the modern inventions that he never got to experience, such as TV, coffee machines, the BorgWatch and the BorgPad, and Krux claimed that he despised modern life. Krux showed Acronix a helmet and said that he would return Ninjago to its "pre-modern glory," before revealing the Vermillion eggs.
Later, Krux unleashed a Vermillion warrior at the big unveiling of the BorgWatch; commanding it to destroy the Borg Store and to kidnap Cyrus Borg himself. When the Ninja arrived, Krux unleashed two more Vermillion warriors. While the Ninja fought off the Vermillion at the Borg Store, Zane and Borg fled the scene, only to be confronted by Krux in the disguise of Dr. Saunders. With Acronix by his side, the two kidnapped Borg and took him back to the museum.
Back at the museum, Acronix expressed his displeasure that they had lost most of their armor for the Vermillion in the battle against the Ninja. However, Krux assured his brother that he already had his "best blacksmiths" working on more armor. Krux then revealed that he had released hundreds of Vermillion eggs into the swamps of Ninjago through the sewer beneath the city.
After locking Cyrus Borg in a Serpentine coffin, Acronix questioned Krux as to how they planned to control the growing force of Vermillion that they needed for "phase two" of their plan. Reminding his brother that he had 40 years to devise the plan, Krux then introduced Raggmunk, Blunck, and Machia; three Vermillion selected from the genetically superior of Serpentine who were thus able to control the other Vermillion warriors telepathically.
When Krux was informed by Raggmunk that Kai had entered the museum, he allowed Acronix to monitor the Ninja through a telescope that he had built into a snake statue since he didn't install a security camera. Noticing that Kai had taken a Vermillion helmet, Acronix feared that the Ninja of Fire was onto their plan and insisted that he neutralize him. Knowing that it would draw too much attention, Krux declared that he would attend to the matter himself and ordered the Vermillion commanders to commence phase two of the plan.
Disguised as Dr. Saunders, Krux confronted Kai. When Kai asked if he recognized the Vermillion helmet, Dr. Saunders claimed that it resembled a post-Serpentine War samurai helmet, but was likely a knockoff. Kai explained that he obtained the helmet during the battle against the Vermillion that attacked the Borg Store and asked if Dr. Saunders had seen it on TV. This prompted Dr. Saunders to mutter under his breath that he despised TV, reverting to his normal voice of Krux for a brief moment. Kai eventually realized that the Vermillion helmet was identical to the helmets worn by Krux and Acronix in the painting. When Dr. Saunders tried to convince Kai that the Time Twins were still a myth, his fake moustache ended up tangled on the snake statue and fell off; revealing his true identity.
A lengthy battle between Krux and Kai ensured, during which Kai discovered that Krux had kidnapped Cyrus Borg and had likely taken Zane as well. As the battle continued, Krux claimed that Kai and Nya's parents were actually traitors who fought with the Time Twins. Due to Kai's anger, Krux briefly gained the upper hand when Acronix revealed himself and prepared to finish off the Ninja of Fire with the Forward Time Blade. However, Nya arrived and helped Kai in the continuing battle. Eventually, Krux was kicked into the same Serpentine coffin that Borg had previously been locked in Before Acronix used the Time Blade to make their escape.
Krux and Acronix, along with the Vermillion army, appeared in Wu's dream.
After the Vermillion hoarded all of the metal they could find in Ninjago City, Krux and Acronix led them through the sewers to their secret lair. When the Time Twins found themselves lost, Acronix gloated that his BorgWatch had built-in GPS. However, the BorgWatch was unable to function because there was no service, and Krux then gloated that this was one of many reasons why he refused to "get with the times." Krux then decided to follow his map, only to be led to a dead end.
At the Vermillion Swamps, Acronix enters Krux's room, telling him that everything is going to plan, including the construction of the snake mech, as well as their "labors" being hard at work on their various projects before asking how things were going with Borg. Krux tells him that it was going poorly, saying he has made little to no progress with the Time Apparatus. Borg then tries to make an excuse as to why, but Krux tells that in his time they built with anything they had and that craftsmanship meant something before accusing him of not wanting to make the apparatus. While Borg states that they can't make him, Machia arrives, having been called to base by Krux to "motivate" Borg. As Machia begins to torture Borg, Acronix slightly cowers behind his brother before telling him that he likes her. As Krux teasingly says that he has a crush on her, to which Acronix rejects. While saying she may be cute and that deep down she is just a pile of snakes, time immediately slows down briefly due to the arrival of the Slow-Mo Time Blade.
While Krux says it has arrived, Acronix begins to use his BorgWatch, which angers Krux. Acronix explains he was trying to use his BorgWatch to uncover the Blade's location, but his brother was distracting him. As Krux tells him he puts too much faith in technology and that his smart watch doesn't seem all that smart, Borg reveals that the BorgWatch has things such as a heart rate monitor, a GPS unit and a temporal anomaly locator, which Acronix uses to locate the Blade at the coordinates 34 degrees latitude and 28 degrees longitude. Defeated, Krux admits that technology has its uses sometimes before Machia identifies the coordinates as the Eastern Sea of Sand, saying both the Vermillion forces at Mega Monster Amusement Park and the scrapyard are in the best position of retrieving it. Saying that the Blade was now top priority, Krux orders Machia to inform Blunk and Raggmunk of the changes of plans.
However, despite originally obtaining the Blade, the Ninja stole it from them with the help of Jay's new Desert Lightning bike. With the mission failed, Blunk and Raggmunk make an excuse to Machia. Though Acronix and Krux were happy, Machia then tells The Hands of Time they failed like she predicted, which angers Krux, asking that they didn't get the Blade. However, Machia reassures him that they will have it soon, using Acronix's temporal anomaly locator to track the Blade in the Ninjas' possession.
Once Blunk and Raggmunk returned to base, Acronix and Krux angrily berate the two for their failure, saying they lost it to a bunch of kids. While explaining that it was the blue Ninja who used his bike, they reveal they used the Time Blade, which they were not given permission to do, with The Hands of Time saying that if they knew how to use it, they wouldn't have lost it. While claiming that they didn't use it, Acronix berates them for losing the Time Blade, using the Time Blade and lying about using and losing the Time Blade. The two try to reassure The Hands of Time, saying they devised a plan which involved trading the Time Blade with the Ninja in exchange to returning Cyrus Borg, but then double cross them and take the Blade from themselves. Krux then tells them that by doing that, the Ninja would learn the location of their base, see their master plan and try to take the Forward Time Blade. He goes on to tell them that they need all the Time Blades, including the one they lost. After Machia threatens Borg for trying to sabotage the Time Apparatus, Blunk tries to come up with another plan, but Machia interrupts by saying they need a plan which will work, which gets Acronix's attention. By using Acronix's temporal anomaly locator on his BorgWatch, they know of the Blade's location, saying all they need to do is go and get it.
Discovering the Blade was at the Ninjas' HQ at the Temple of Airjitzu, the Vermillion warriors, along with Acronix, Krux, Blunk, Raggmunk and Machia then begin their assault by catapulting a Vermillion egg into the temple, which alerts the Ninja of their prescene. After launching more eggs up to the temple, the Ninja use Spinjitzu and easily defeat them, with Blunk telling Acronix that having Machia in charge was a bad idea, but she reassures them that it was only the first salvo and that next they send in "the big boy," using them remaining snakes and armor up at the temple to create a Buffmillion warrior, which the Ninja barely succeed in defeating. The Vermillion then bombard the Destiny's Bounty 2.0, causing it to fall down to the ground below. Machia then orders a full on assault, saying not to stop until the mission is complete.
Eventually, Lloyd goes down to the Vermillion launch site and demoslishes some of their weaponry, including a Vermillion egg full of swords, which come down next to the commanders, but doesn't hit any of them. Machia then orders the sky team to go in, ultimately succeeding in causing Lloyd to lose control of his dragon, but he is saved by the arrival of the new Samurai X. While The Hands of Time ask what is taking so long, Machia assures them that it was only a minor setback.
With that, Acronix and Krux, now armed with the Forward Time Blade, personally attack the temple themselves, using two Vermillion jetpacks to reach the temple grounds. As Cole, Nya, Zane, Lloyd and Zane charge towards the two, Acronix and Krux hold hands as Acronix uses the Forward Time Blade to teleport the two of them directly to Kai and Master Wu, punching both of them down to the ground. Acronix then goes after the weakened Wu with the Forward Time Blade, but Cole throws Wu the Slow-Mo Time Blade, which he uses to defend himself. As Acronix tells him that is luck is about to run out, Wu uses the Slow-Mo Time Blade on Acronix, causing him to slow down. With this opportunity, Wu strikes the Forward Time Blade out of Acronix's hand and onto the ground, where Krux obtains it. As Kai battles him with the Slow-Mo Time Blade, Acronix becomes free of the Slow-Mo Time Blade's time bubble effect, where he claims a discarded sword and tries to help his brother, but is stopped by Jay and Lloyd. As Acronix mocks Lloyd for trying to be a big, brave hero, Lloyd tells him that underestimating his fighting skills is a mistake, but Acronix mocks him further for falling off his dragon. Acronix then attacks the two with his sword and nearly hits Lloyd, but he ducks out of the way.
As the fighting continued and the Ninja soon disposed of the arrival of Vermillion reinforcements, Cole ground pounds the ground, sending a shockwave which knocks everyone down. Now in a similar predicament as they were forty years ago during their battle with the original Elemental Masters in the forest, Acronix and Krux pick up Lloyd by his feet and swing him around, knocking down the others before throwing him to the ground. While Jay fights Acronix, Kai throws Lloyd the Slow-Mo Time Blade, who uses it to battle Krux. As the two lock Time Blades, Lloyd manages to swing Krux around, launching him into his brother and dropping the Forward Time Blade, which Cole catches and gives Lloyd. As the Ninja celebrate, Machia arrives and swipes both Time Blades from Lloyd, landing next to The Hands of Time. Machia then slows down the Ninja with the Slow-Mo Time Blade. Telling the two that the Time Blades belonged to them, Acronix orders Wu to be captured as Machia's airship arrives. As the four board, Acronix says they are wasting precious time before the ship flees the area with Krux, Acronix, Machia, both Time Blades and Wu all safely on board.
Now armed with both Time Blades, Acronix and Krux lead the Vermillion warriors back to base. The two then begin to taunt Wu, suggesting he's gone deaf with old age. Wu tells them that he can hear every one of their attempts at humor, but Acronix and Krux laugh it off as they continue onwards. Krux then calls for Blunk and Raggmunk, telling them that he and his brother have been concerned for the leadership of the Vermillion warriors, saying that their mission didn't go quite as planned. While the two general think Machia would be in trouble, Acronix tells Machia that he and Krux were impressed with her actions, ultimately promoting her to the Sumpreme Commander of the Vermillion while demoting Blunk and Raggmunk to order under her, which angers Blunk and Raggmunk, but Machia puts them in their place. Wu then asks them if all of this promoting was premature, saying his Ninja was still out there, but as they arrive at the Vermillon Swamps, Acronix tells him that they have no master, no Time Blades and certainly no chance. As Acronix says taunts Wu by saying he almost feels sorry for them, the group laughs excluding Wu. Acronix then begins to use his BorgWatch, which angers Krux. Acronix tells him he was sharing this victory with his Instabook followers, texting in that he has achieved total victory. As Krux tells him he ruined a good moment with his "techo-garbage," Acronix asks him why he is so stubborn about staying in the ancient past.
Before the Ninja moved out to go search for answers, Misako reveals that during Wu and Acronix's battle at the monastery, Acronix struck him with a punch powered by the Forward Time Blade, explaining that the Blade unleashed the forward energy of time onto Wu.
Eventually, as the Ninja uncovered the location of the Vermillion Swamps, Acronix, Krux and Machia threaten Borg again for stalling in the construction of the Time Apparatus. As he got back to work, the three of them laughed.
During one of Wu's hallucinations, Acronix and Krux arrive as one of Wu's many mistakes, with Acronix saying Wu never should of came all by himself.
While Krux talks with Borg once the Time Apparatus is completed, Acronix arrives with Machia, saying the third Time Blade is about to arrive. Krux then takes the Slow-Mo Time Blade from the apparatus and leaves with Acronix, Machia and Cyrus Borg to retrieve the third Time Blade. Traveling to the Glacier Barrens, Krux questions Acronix on the Blade, with Acronix saying it was about to arrive in just a moment. On que, the Temporal Vortex opens in the sky above, releasing the Pause Time Blade. As it landed, it paused all of Time. Once its effects wore off, Krux claimed the Blade, with Acronix telling him that the BorgWatch worked perfectly. He then tries to get Krux to admit that not all modern technology was bad as the third Time Blade was the easiest on to get, but Krux tells him that he won't until they find the final Blade, a task which Acronix's BorgWatch can't do. As Krux returns to Machia's ship, he tells himself that his mother always said Krux was the stubborn one.
While this happened, Kai and Nya reunite with Ray and Maya, their father and mother respectively. Kai tells Nya that they were the enemy, saying they've been helping Krux and Acronix for years. As Maya tells them they forced them to work for them, they explain what truly happened. When Krux and Acronix were still Elemental Masters, Wu devised a plan that involved Ray and Maya's skill. Wu tasked them with creating the Time Blades in order to strip Krux and Acronix of their powers. However, this would leave them weakened once the deed ws done, explaining why they weren't present during the battle with Krux and Acronix and the monastery. They further explained that after Krux and Acronix went after the Blades by going into the Temporal Vortex, Wu saw a vision that described the exact date of when Acronix would return to the monastery. However, Krux escaped the vortex and saw this vision as well. In the time between the battle at the monastery and Acronix's return, Krux created his master plan, starting off by breeding some Vermillion warriors. He then went on to capture Ray and Maya, threatening that if they didn't work for him, he would harm a young Kai and Nya. Ray then tells them that his markings on the Vermillion helmets were a message for someone to find out the truth, saying that together, they could stop Krux and Acronix's ultimate plan to control all of Time.
Meanwhile, Machia's ship returns to the Vermillion Swamps. As Kai forgives them for his accusations, Nya asks how Krux and Acronix planned on controlling all of Time. Ray then reveals the blueprints for the Iron Doom, a mech that served as a transport for the Vermillion across Time. Maya then reveals that the reason why they captured Cyrus Borg was so he could build a power source for the Iron Doom, which involved harnessing the powers of all four Time Blades. While this happened, Krux and Acronix, along with a battalion of Vermillion warriors lead by Machia, sneak up onto the blacksmith shop, where they overhear that the Reversal Time Blade, the fourth and final Blade, was ultimately placed in the Boiling Sea by them under the orders of Wu after they discovered it in the woods below the monastery, saying they only the Masters of Fire and Water could get it. After Maya realizes that Kai and Nya could be used, the group is about to leave, but is confronted by Krux and Acronix, who then wants them to obtain it for them. After pausing Ray with the Pause Time Blade and revealing Wu, Acronix tells them that the Reversal Time Blade is the only way to undo the effects of the time punch on Wu, with Krux saying that if they want to save Wu, they will retrieve the fourth Blade for them. With that, Acronix, Krux, Machia, Wu, Kai, Nya, Ray and Maya board Machia's ship offscreen and proceed to the Boiling Sea, passing over the other Ninja as they are confronted by the Vermillion lead by Blunk and Raggmunk.
As Machia's ship approaches the Boiling Sea, Krux tells his brother that the final Time Blade will soon be theirs, but Machia wonders if it is just a Ninja trick, to which Acronix reponds that it best not be for the sake of the dying Wu. Upon arriving, Ray explains they need the Dragon Blade before taking it from Krux. As Acronix asks him what he was doing, Machia immediately attack Ray, but he tells them that the Dragon Blade is the key in getting them the last Time Blade. As Krux tells him that it's only one Blade and that they still have three Time Blades, Acronix says that escape is futile, though he would like to see them try before Krux orders Machia to give the Blade to Kai and Nya. Acronix then witnessed Kai and Nya create the Fusion Dragon and use it to plunge into the Boiling Sea in hopes of obtaining the final Time Blade.
After a while, Acronix wonders where Kai and Nya are, asking Krux what to do if they failed. At that moment, the two return on the Fusion Dragon with the Reversal Time Blade in hand. After landing on the ship, Kai rushes to use it on Wu, but is stopped by Acronix and Krux, who reveals they lied about allowing Kai to use the Reversal Time Blade to save Wu, asking him that did they expect to allow Wu to remain after all the trouble he has caused them in the past. A fight begins, with Acronix fighting Nya with the Pause and Forward Time Blades. However, he is kicked away by Nya after Machia is knocked into Krux. As Kai rushes to Wu's aid, Acronix appears from behind and is about to strike Kai with the Forward Time Blade, but Kai is pushed out of the way by Ray, who takes the hit instead, causing him to begin to rapidly age. Rejoining with his brother, Acronix then pauses the group, with Krux commending his brother for his work. Now with all four Time Blades, Acronix says it is time to return to the swamps, with Krux asking what to do with the others, with Acronix ordering Machia to drop them off at their current location. After disposing of them, they return to the Dome at the Vermillion Swamps.
Upon arriving at the Dome, they see that the other Ninja are attacking and that Zane, Samurai X and Cyrus Borg are attempting to disable the Iron Doom. Ordering Machia to proceed as planned, Krux and Acronix jump off the ship and land behind the trio. Krux then proceeds to pause the trio with the Pause Time Blade just before Zane could put in the final number to disable the Iron Doom, with Acronix saying they have zero chance. After plugging in the four Time Blades into the Time Apparatus and the Iron Doom begins to power on, Acronix punches the trio off the side of the scaffolding, but they are caught by Jay, Cole and Lloyd. Acronix, Krux and Machia then board the Iron Doom after the other Vermillion warriors. As the Iron Doom destroys the surrounding scaffolding, it charges up and creates a Temporal Vortex in the skies above the Iron Doom. As Krux tells Acronix that it will be ready in just a few more moments, Acronix says that Ninjago will be theirs and that nothing can stop them. At that moment, the Fusion Dragon arrives, to which Krux angrily asks his brother why he jinxed it. As the Iron Doom became fully ready, The Hands of Time then say their signature quote as the Iron Doom launches into the Temporal Vortex, unaware that the Fusion Dragon carrying Kai, Nya and Wu followed them into the vortex.
The Iron Doom proceeds to travel back in time through the Temporal Vortex. As Acronix admires the majesty of time travel, he takes a picture of the vortex with his BorgPad, saying it wasn't quite capturing the majesty and needed a different filter. However, Krux knocks the BorgPad aside and tells him that they are approaching their temporal destination before ordering Machia to ready her troops. As Krux explains to Acronix that decades of planning was finally about to pay off and that the battle will be re-fought, Acronix tells him that no one can stop them. The Iron Doom then begins to shake violently as it arrives in the past.
Landing at the Monastery of Spinjitzu forty years in the past directly after the past versions of Krux and Acronix were lost in time, the future versions of Krux and Acronix confront the past Elemental Alliance, where Acronix gloats over their confidence. As Krux explains to them that they have stopped them once today, but it was before they had a legion spawned from the Great Devouerer. After young Wu tells the group to focus, Acronix tells Machia it was time, who then orders her Vermillion army into battle.
After Kai and Nya began to secretly help the past Elemental Alliance by posing as Ray and Maya, they begin to defeat the Vermillion. As Krux says they are losing, Raggmunk and Blunk arrive, saying it was only a temporary setback. As Acronix tells them that they did not travel across decades to suffer temporary setbacks, Acronix nods to Krux as they smash the two generals into the component snakes before taking their helmets. As Machia arrives, Krux then reveals she too has outlived her usefulness as she too is destroyed, with Acronix saying she was reliefed of her duties before boarding the Iron Doom.
Using their helmets, Acronix and Krux telepathically smash the rest of the Vermillion warriors, ordering them to return to the Iron Doom. As the snakes merge with the Iron Doom, Acronix tells the Iron Doom to arise as it comes to life and towers over the monastery. Using the Iron Doom, The Hands of Time are able to overpower the Elemental Alliance and capture young Wu, where they tell him their terms of surrender. Krux tells him that if he yields, they will destroy the Elemental Alliance, but spare the citizens of Ninjago while Acronix tells him that if he refuses, they will still destroy them, but the citizens will not be spared. As Krux asks him to yield, young Wu yields, ultimately changing the future into their image.
After throwing young Wu back to the other masters, the Iron Doom confronts them, with Acronix asking who they should destroy first between Garmadon and Wu. At that moment, the Fusion Dragon arrives and attacks the Iron Doom. Acronix then says that Ray and Maya are just as bad as their kids. Krux then tells him that they are their kids, ordering for a maximum barrage. As the Iron Doom fires Vermillion eggs at the Fusion Dragon, they all miss and Kai and Nya blast the cockpit with their powers, knocking Krux and Acronix away from the controls. As Acronix says to fight Fire with Time, Krux tells him he hates his sayings before Acronix orders for full temporal energy. After the Iron Doom sends a Slow-Mo shot towards Nya, who bailed from the Fusion Dragon to retrieve something, the past Elemental Alliance distracts the Iron Doom. With this distraction, Kai slams the Fusion Dragon into the Iron Doom, causing it to fall onto the structure and look down the cliffside in a similar fashion as to Acronix and Wu's fight at the ruins of the monastery in the future.
After getting the Iron Doom back up, Krux says that he will destroy Kai and Nya even if he must do it with his bare hands. Acronix then tells him that they still have the Iron Doom and that they can go anywhere in time they please, saying that if the battle was too difficult in the past, they should go to a time where they are sure a victory and a time where Kai and Nya do not exist. As Krux suggests to go further back in the past, Acronix tells him the opposite; far into the future. Using his helmet, Acronix uses the Iron Doom to open another Temporal Vortex. Just before they could leave, the Fusion Dragon attempted to strike it one last time, but Acronix orders it to duck. As the Fusion Dragon de-materialized, the Iron Doom entered the vortex as it closed behind them. Unfortunately for The Hands of Time, Nya managed to recover the past Reversal Time Blade from the woods below the monastery and used it to restore Wu. With the past Reversal Time Blade, Kai, Nya and Wu reverse time so that they could follow The Hands of Time into the vortex.
As the Iron Doom traveled to the future, Krux complained to Acronix about going to the future. Acronix tells him that by going into the future, there would be no one who recognizes them, no Elemental Masters and no Kai and Nya. At that moment however, the Time Twins are confronted by Kai, Nya and Wu. As a final battle between them begins, Krux fights Kai while Acronix fights Nya and Wu. After Nya leaves to help her brother in fighting Krux, Acronix says to Wu that his brother needs his help and tells Wu that he will deal with him later before kicking him aside.
As the Iron Doom began to pass by the present, Krux and his brother defeat the ninja and were about to finish off Kai and Nya, but are stopped by Wu. As Acronix tells him there is nothing he can do, Wu then proceeds to rip out the Reversal Time Blade from the Time Apparatus, causing the Iron Doom to spin out of control. After giving the Reversal Time Blade to Kai and Nya before they returned to the present so that they can cure Ray of the time punch, Wu confronts a defeated Krux and Acronix, saying that it indeed ends now. As the three fought, the Iron Doom became lost in time with them still aboard as it traveled far into the future.
Prior to Sons of Garmadon
At some point after becoming lost in time, Master Wu was presumably able to defeat his foes before he was able to escape the vortex however, the fates of Krux and Acronix remain unknown.
Krux appears in one of Master Wu's flashbacks while the latter was regaining his memories, particularly the moment Krux, Acronix, and Wu were all lost in time aboard the Iron Doom.
Krux is one of the two Elemental Masters of Time, also known as the Hands of Time. While Acronix disappeared in Wu and Garmadon’s temporal vortex 40 years ago, it appeared that Krux had been destroyed. Little did anyone know that Krux secretly remained behind. Before he was stripped of his powers, Krux could both reverse and pause time, a power he used to great advantage in battle. Even without those powers, Krux is a fierce warrior – relentless and cunning. Krux is also the mastermind behind the Hands of Time. He has always been a cautious planner, as evidenced by his willingness to create a plan that would take four decades to unfold. But the 40 years he spent waiting for Acronix were hard as he watched everything around him become modern and interconnected. Krux despises this way of life – it’s annoyingly distracting – which is why, more than anything, he wants to return to the good ol’ days.
Krux is shown to be a ruthless individual, as he had threatened the lives of two children to get their parents to comply with his demands.
He is proven to be a patient person, as he waited forty years to be reunited with his younger brother Acronix and for his plans to strike back at Wu.
It appears Acronix is the only person he cares about as he waited decades to reconnect with him and the first thing he did in their reunion was hug him. Krux had grown up in a Ninjago without technology so when he saw it rise, he despised it, unlike his brother. As Dr. Saunders, he seems harmless and a little crazy. All of this is just a façade, as he is actually cunning and manipulating, but easily angered by Acronix constantly loving technology. However, Krux is not above admitting that technology has its uses but still doesn't like it out of pride.
According to his mother, Krux is also stubborn.
- The younger version of Krux was released as a minifigure in the 2017 Ninjago Bricktober set, with the most prevalent change being his new, younger face, as well as his outfit and armor being brighter and vivid like Acronix's.
- Krux's name comes from Crux, a file sharing software used in the production of the TV series.
- Coincidentally, Crux is also the name of the main setting for LEGO Universe, in which LEGO Ninjago: Masters of Spinjitzu appeared.
- Acronix and Krux were originally meant to be one character, named "Kronos."
- His outfit and armor are more dull and faded than his brother's because it is much older.
- He is the reason Kai and Nya's parents disappeared due to his threat of harming a young Kai and Nya should their parents refuse to obey him.
- Just like Kai, Krux despises technology, though his dislike is more extreme as he claims technology ruined Ninjago.
- However, Krux did admit that sometimes modern technology has its uses after Acronix's BorgWatch found out the locations of the Slow-Mo and Pause Time Blades. Though, he still admitted his dislike of it as his brother stated their mother always called him stubborn.
- Ironically, as Acronix is in his youth and loves new modern technology, Krux is old and prefers the old ways of life. This is also shown with his Elemental Powers of being able to freeze and rewind time, whereas his brother can slow down and speed up time.
- Krux and Dr. Saunders are the same person, sporting an identical hairstyle and alternate face.
- It is mentioned that Cole enjoyed some of the tours of the museum when Krux was disguised as Dr. Saunders.
- Before having his powers drained by Wu and Garmadon, Krux was able to pause and rewind time.
- Krux is chronologically three minutes older than his twin brother Acronix, but because his brother was lost in time for forty years and didn't age, he is now biologically several decades older than him.
- Krux appears alongside his brother as a boss in The LEGO Ninjago Movie Videogame and can be unlocked as a playable character by achieving silver medal status or higher in said dojo, which requires the player to accumulate at least 50,000 studs.
- In the game, Krux emits red energy from his hands despite being depowered, although he cannot use his elemental powers in game and instead can disguise himself as Dr. Saunders.
- Curiously, Krux wields a spear and a shield as a boss but wields a Vermillion axe as a playable character.
- ↑ https://www.lego.com/en-us/ninjago/characters/krux-season-7-b68e38eb951d4b1fbaf20dd60c35c14b
- ↑ https://twitter.com/TommyAndreasen/status/811993709415923714
- ↑ https://twitter.com/TommyAndreasen/status/858593180861726720