“All the tombs have been interconnected.”
“To make one massive underground fortress.”
Kai and Cole

The Serpentine's Underground Fortress is a massive subterranean lair, built beneath the Constrictai Tomb for the Serpentine to use during their hunt for the Fangblades. Numerous tunnels connect the fortress to the other Serpentine Tombs, enabling the snakes to move around Ninjago without being detected by their enemies. 

History

All of Nothing

When the Ninja discover that the Serpentine have been using underground routes to sneak around and retrieve the Fangblades, they head out to get the Fangblades back.

The Ninja quietly move in the shadows of the Underground Fortress, watching the snakes converse among themselves. However, they are quickly spotted, and Nya tries to contact Lloyd to no avail. As all four Ninja fight the Serpentine, they notice that in the middle of the room is all four silver Fangblades. Cole makes a run for it but is quickly stopped in place with a trap. Spikes rise up from the ground and create a giant cage, encasing them.

Nya successfully contacts Lloyd and informs him of their situation, to which Lloyd rushes over. Chokun and Acidicus suggest that they celebrate, and Pythor agrees after a bit of convincing from Skales. The Serpentine proceed to celebrate with the Slither Pit, as it is entertainment in the Serpentine's eyes, and while the Ninja contemplate an escape plan, Lloyd arrives, however, he is noticed immediately because he trips and falls down to where a crowd of snakes are cheering. As Lloyd is humiliated, Lord Garmadon appears with the Skulkin army behind him, and they rush into battle. Lloyd releases the Ninja from their confinement, and they escape with the Fangblades.

Gallery

Landmarks, Vehicles, and more

Locations

Abandoned Village · Anacondrai Tomb · Ancient Pyramid · Birchwood Forest · Blackwood Forest · Billy Badlands · Boiling Sea · Bottomless pit · Caves of Despair · Chen's Camp · Chen's Island · Chen's Monastery · Chrono Crater (non-canon) · Constrictai Tomb · Corridor of Elders · Crashcourse Canyon · Dark Island · Desert Pyramid · Digger's Deep · Digiverse · Dream World (non-canon) · Dungeons of Shintaro · Echo Canyons · Endless Sea · Fangpyre Tomb · Fire Temple · Floating Ruins · Forest of Tranquility · Frozen Ice Pond · Frozen Wasteland · Geckle Strong-Cave · Glacier Barrens · Glacier Island (non-canon) · Golden Peaks · Haunted Hill · Hiroshi's Labyrinth · Hollow's Bluff · Hypnobrai Tomb · Ice Fortress · Ice labyrinth · Infinity Maze · Ignacia · Jamanakai Village · Jankikai Jungle · Kingdom of Shintaro · Mala Wujira · Mega Monster Amusement Park · Metalonia · Mount of Eternal Shadows · Mountain of a Million Steps · Mountain of Madness · Mountains of Impossible Height · Munce Home-Cave · Ninjago City · Ninjago Harbor · Ninjago · Ninjago (LEGO Universe) (non-canon) · Ninjago Sky · Nom (non-canon) · No Man's Bluff · Oni Land · Ouroboros · Prime Empire (Terra Karana · Terra Technica · Terra Domina · Side-Scrolling Platform · Infinity Maze) · Primeval's Eye · Repo yard · River of Darkness · Rock-Bottom · Samurai X Cave · Sea of Sand · Shadow Bay · Shintaro · Shintaro Mines · Shintaro Palace Gardens · Side-Scrolling Platform · Spinjago (non-canon) · Spirit Coves · Stiix · Stone Army Tomb · Tiger Widow Island · Tomb of the First Spinjitzu Master · Torchfire Mountain · Toxic Bogs · Venomari Tomb · Vermillion Swamps · Vlad Tutu's Dance Class · Wailing Alps · Well of Souls · Wildwood Forest

Buildings

Battle Arena · Biker Tavern · Borg Store · Borg Tower · Buddy's Pizza · Chan's Theater · Chen's Palace · Concert Hall · Dareth's Apartment · Domu · Dragon's Forge · Ed & Edna's Scrap N Junk · Explorers Club · Four Weapons Blacksmith · Fur Mart · Gamer's Market · Garmadon's Dark Fortress · Grand Sensei Dareth's Mojo Dojo · Hanging Temple · Hidden Workshop · Hiroshi Labyrinth Stronghold · Hono Mizu · Kiddie Arcade · Kryptarium Prison · Laughy's · Lloyd's Treehouse Fortress · Marty Oppenheimer School of Performing Arts · Monastery of Spinjitzu · Ninjago City Aquarium · Ninjago City Bank · Ninjago City Hospital · Ninjago City Police Station · Ninjago City Prison · Ninjago Doomsday Comix · Ninjago Metro · Ninjago Museum of History · Old Electronics Warehouse · Oni Temple · Royal Palace · Shintaro Palace · Skull Keep · The Serpentine's Underground Fortress · Steep Wisdom · Temple of Airjitzu · Temple of Fortitude · Temple of Light · Temple of Madness · Temple of Resurrection · · Underground Library · Vermillion Dome of Doom · Wind Farms Power Station · Wong's Costume · Wu's Academy · Yang Tavern

Vehicles

Battle Wagon · Blade-Copter · Blade Cycle · Blue Dragon · Chain Cycle · Chenosaurus · Chen's Blimp · Chen's Ferry · Cliff Gordon's Yacht · Clouse's Earth Mech · Cole's Earth Mech · Condrai Buggy · Condrai Crusher · D.B. Express · Desert Lightning · Destiny's Bounty (2.0 · Black Bounty · Destiny's Shadow) · Destructoid · Dieselnaut · Earth Driller · ElectroMech · Empire Dragon · Fangpyre Robot · Fangpyre Wrecking Ball · Fire Mech · Fire Stone Mech · Firstbourne Mech · Flying Speeder · Garmatron · Ghost Cycle · Ghost Taker GT · Golden Master's Mech · Golden Mech · Hopper · Hover-Copter · Iron Doom · Jalopy · Jungle Chopper Bike · Jungle Raider · Kai Fighter · Kai's Bike · Katana V11 · Katana 4x4 · Lightning Offroader · Lunar Rover · Mech-enstein · Mech Jet · Misfortune's Keep · Nindroid MechDragon · Ninja Nightcrawler · Nya's Bike · Oni Bike · Proto Sam-X · Prototype X-1 · Racing Bike · Raid Zeppelin · Rattlecopter · R.E.X. · Rock Cycle · Rock Roader · Ronin's Mech (non-canon) · Roto Jet · Salvage M.E.C. · Samurai Mech · Samurai Mech 2.0 · Samurai Mech (Stone Army) · Samurai VXL · Security Mech · Serpentine Bus · Serpentine Train · Snowmobile · Skulkin Mech · Sky Shark · Storm Fighter · Titanium Ninja Tumbler · Tread Assault · Ultra Sonic Raider · Ultra Stealth Raider · Vermillion Invader · Vermillion Racer · Vermillion Ship · Warrior Bike · Wu's Rickshaw · Wu's Ship · Zane's Bike · Zane's Titan Mech

Other Realms

Chima · Cloud Kingdom · Cursed Realm · Departed Realm · Djinjago · Never-Realm · Realm of Madness · Realm of Oni and Dragons · Underworld

The LEGO Ninjago Movie Locations

Ninjago City · Ninjago · Bridge of Fallen Mentors · Canyon of General Unhappiness · Firing Room · Garmadon's Volcano Lair · Jungle of Lost Souls · Koko's Apartment · Lost Generals' Lair · Ninja Mech Garage · Ninjago Beach · Ninjago High School · Ninjago Tower · Temple of Fragile Foundations

The LEGO Ninjago Movie Vehicles

Destiny's Bounty · Fire Mech · Flying Jelly Subs · Garma Mecha Man · Green Ninja Mech Dragon · Ice Tank · Lightning Jet · Ninja Helicopter · Piranha Mechs · Manta Ray Bombers · Quake Mech · Shark Mech · Water Strider

In-Universe Books

Boobytraps and How to Survive Them · Book of Spells · Cliff Gordon's Guide to Wooing Women · Desert of Doom · First Spinjitzu Master's Book · Ninjanuity · Ninjelligence · Serpentine Book · Starfarer · Wu's Lesson Book

In-Universe Video Games

Conic the Ratboy · Counter · Dancy Pants · Fist to Face · Lava Zombies · Lightning Larrikin (non-canon) · Pinball Racer (non-canon) · Prime Empire · Sitar Legend · Turbo Street Brawler

Artifacts

Amulet of Protection · Bell of Divinity · Blade Cup · Celestial Clock · Chest Vortex · Dragon Armor (Blade · Chestplate · Helmet · Shield) · Helmet of Shadows · Jadeblade Statue · Lantern · Map of Dens · Map of Fangs · Map of the Golden Weapons · Medallion · Mirror of Fears · Oni Masks (Deception · Hatred · Vengeance) · Realm Crystal · Scroll of Airjitzu · Teapot of Tyrahn · Underworld Helmet

Portals and Gateways

Blind Man's Eye · Glitch · Manifestation Gate · Rift of Return · Temporal Vortex

Other

BorgPad · Borg Industries · BorgWatch · Cell One · Cliff Gordon's Replica · Creatures Beasts & Beyond · Credits · Cyrus Borg's Statue · Darnagom Enterprises · Dapper Dan · Energy Cubes · Fangpyre skeleton · Fireblock SPF-3000 · Hall of Villainy · Health Boards · Illuma-Swords · Infovision · Kai Action Figures · Kai's Headband · Minidroid Chess · Mystery Dust (non-canon) · Original Prime Empire arcade cabinet · Perfect Match Console · Police Commissioner's Model Boat · Ramne Noodle Cart · Route 23 · Samurai X suit · Shintaro Wings · Shrinking Pill · Soda guzzler · Thermal Kinetic Inverter · Traveler's Tree · Ultra Hunt · Vast Industries

Metaphysical Concepts

The Balance · Death · Souls

Community content is available under CC-BY-SA unless otherwise noted.