Acronix

Acronix is a powerless Elemental Master of Time. He is one of the Time Twins and the younger sibling of Krux. Once a proud Elemental Master who helped win the Serpentine War, Acronix and his brother realized the superiority of their element, and believed they deserved to rule Ninjago. In response, their former allies forged a set of weapons that absorbed the twins' elements. Acronix and Krux were lost to the Time Vortex, but Krux managed to escape.

For forty years, Acronix remained in the Vortex, and didn't age during that time. Upon his return at the Monastery, he was confronted by Wu, who had been waiting for him. Acronix was swiftly beaten by Wu, but by using a Time Blade, Wu began to rapidly age. Acronix reunited with his brother, who had raised an army of Vermillion snakes. After capturing Cyrus Borg, they began building a time-traveling weapon, the Iron Doom, so they can travel into the past and give themselves a better future. Despite his brother's animosity towards technology, Acronix greatly enjoyed it; the siblings disagreed constantly, but nevertheless strived towards their goal together.

Without a master to guide them, the Ninja fought against Acronix and Krux numerous times, but were unable to gain the upper hand. Ultimately, the Iron Doom was completed, and Acronix traveled back in time to defeat the original Elemental Masters. Kai and Nya made a final effort to thwart their plans by aiding the Elemental Masters. When the Iron Doom tried traveling into the future, Wu removed a Time Blade from the weapon—causing it to spiral out of control. Though Kai and Nya escaped, Acronix was lost in the Time Vortex along with his brother and their former ally.

History
40 years prior to the events of Hands of Time, Acronix and his brother Krux were the original Elemental Masters of time. While Krux could go back in time and pause time, Acronix could go forward in time and slow down time. Although Acronix used these powers to great advantage, he was still a very skilled warrior without them.

After the Serpentine were defeated by the Elemental Alliance, Acronix and Krux, 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 Acronix and Krux, 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 Acronix and Krux'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, Acronix and Krux decided to go through the Vortex themselves, which left the two "lost to time." Acronix would be lost in the Time Vortex for the next forty years. However, unbeknownst to Acronix, Krux was somehow immediately teleported back to Ninjago and experienced a vision of the future foretelling of Acronix's return.

Dark Island Trilogy, Part 3
Falling asleep at home following his battle with Clouse, Wu was stricken by a horrible nightmare filled with several visions of the past and future, such as the return of Acronix and Krux.

The Hands of Time
Forty years after the monastery battle, Acronix emerged from the Time Vortex at the ruins of the old monastery just as he was when he went into the Vortex. Upon arriving however, he was unexpectedly confronted by Master Wu, who intended to finish their battle once and for all.

Eventually, a battle between the two broke out with Acronix confident in his ability to defeat his much older opponent. After nearly falling to his death, the Forward Time Blade lands in the center courtyard and causes time to skip a minute, ultimately saving him and allowing him to claim the weapon. With the blade, he succeeded in accelerating Wu's growth, making him feel older. When the Ninja interfered, he defeated them with ease and headed to the Ninjago History Museum to meet someone after being assumed deceased after the Forward Time Blade supposedly was destroyed by Lloyd, Kai, and Jay. When he arrived to the museum, Dr. Saunders revealed his identity of being Krux as they hugged and began plotting their revenge.

The Hatching
Now after being reunited, they were beginning to plot their revenge on Wu. Acronix was amazed by Ninjago's new technological advancements, especially the BorgWatch shown on Borg's commercial while Krux was being irritated. They then decided to make their move and abduct Borg so he can build the apparatus for the Iron Doom, their time traveling battle station.

Krux introduced his army to his brother what he was working on forty years since their defeat—raising Vermillion Warrirors from eggs of the Great Devourer. When the Vermillion Warrior sent by the twins wrecked Borg's shop, the Ninja came to help as the twins sent two more warriors. After Zane escaped with Borg, Krux intercepted them disguised as Dr. Saunders while Acronix deactivated Zane with the Forward Time Blade. Both Acronix and Krux escaped to their hideout in the museum with Borg. Krux then showed his brother the entire army of Vermillion Warriors waiting to hatch from their eggs.

A Time of Traitors
After the Vermillion Warriors kidnapped Borg and locked him in the coffin, Acronix questioned how they will get the Warriors to listen to them. Krux introduced Commander Blunck, Commander Raggmunk, and Commander Machia and told his brother that they will command the Vermillion for them, and they begun planning Phase II of their plan. A while later just as they were about to put the plan into action, Kai intruded the museum to find Dr. Saunders and got spotted by a Vermillion Sentry who informed Raggmunk that Kai has arrived to the museum.

Krux ordered the Commanders to commence Phase II while he will take care of Kai disguised as Dr. Saunders. Eventually, after the Vermillion launched Phase II, Kai accidentally opened Krux's lab. Acronix wanted to give Kai the "Time Punch" but failed when Kai got off of the chair, that controlled the entry in Krux's Lab, causing the door to shut in front of Acronix's eyes. Later, Kai discovered that Saunders is Krux and battled him. Kai hit the Serpentine Statue, which unbeknownst to him, Krux installed a periscope which hit Acronix in his eyes. Acronix, now angry that he didn't finish Kai of in the Monastery when he had the chance, went to help his brother, only for Kai to push Krux into the Serpentine Coffin which blocked the passageway and trapped Acronix in Krux's Lab. A while later Acronix blasted the coffin out with the "Time Punch" and came out to help his brother against Kai. After The Hands Of Time gained the upper hand, Nya came and helped Kai battle against the Time Twins. Kai and Nya locked Krux in the coffin which Borg was formerly trapped in (until Kai pushed Krux into the coffin earlier in the battle), helping them gain the upper hand. Acronix grabbed the Forward Time Blade along with Borg and used it to send himself, Borg, and Krux, still in the coffin, Forward into Time, allowing them to escape.

Ninjago.com Description
''Because Acronix was carried off inside the Time Vortex, the past 40 years have gone by for him in the blink of an eye. So while his brother Krux aged in real time over the four decades, Acronix looks just the same as when he disappeared. As an Elemental Master of Time, Acronix could manipulate time forward, both with great speed or in slow motion. Although Wu and Garmadon stripped him of those powers, he remained a tactical fighter who Wu described as one of the best he’s ever seen. Acronix’s skill with any weapon can lead him to be overconfident at times, and he will throw himself into a fight like a blunt object with little concern for the consequences… mostly because he’s sure there’s no way he could ever lose! Acronix loves all the technology and gadgetry he never experienced because he missed the last 40 years. His favorite is the BorgWatch.''

Appearances

 * 70626 Dawn of Iron Doom

Season 7: The Hands of Time

 * 65. "The Hands of Time"
 * 66. "The Hatching"
 * 67. "A Time of Traitors"
 * 68. "Scavengers"
 * 69. "A Line in the Sand"
 * 70. "The Attack"
 * 71. "Secrets Discovered"
 * 72. "Pause and Effect"
 * 73. "Out of the Fire and Into the Boiling Sea"
 * 74. "Lost in Time"

Dark Island Trilogy

 * Dark Island Trilogy, Part 3