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The Serpentine's Underground Fortress is a location in the world of Ninjago. It 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 they celebrate, and Pythor agrees after a bit of convincing from Skales. The Serpentine proceed to celebrate with the Slither Pit, and while the Ninja contemplate an escape plan, Lloyd arrives, however, he is noticed immediately because he trips and falls all the way 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

Ignacia · Mountains of Impossible Height · Caves of Despair · Floating Ruins · Frozen Wasteland · Ice Fortress · Forest of Tranquility · Fire Temple · Ninjago Sky · Jamanakai Village · Wildwood Forest · The Lost City of Ouroboros · The Toxic Bogs · Torchfire Mountain · Desert Pyramid · Ninjago City · Mountain of a Million Steps · Birchwood Forest · Hypnobrai Tomb · Fangpyre Tomb · Anacondrai Tomb · Constrictai Tomb · Venomari Tomb · Sea of Sand · Mountain of Madness · Mega Monster Amusement Park · Spirit Coves · Golden Peaks · Crashcourse Canyon · Glacier Barrens · Stone Army Tomb · The Dark Island · Samurai X Cave · Hiroshi's Labyrinth · Blackwood Forest · Chen's Island · Chen's Camp · Echo Canyons · Corridor of Elders · Spinjago · Stiix · Haunted Hill · Wailing Alps · Vermillion Swamps · Boiling Sea · Ninjago Island · Endless Sea · Chrono Crater (Non-canon)

Buildings

Four Weapons Blacksmith · Monastery of Spinjitzu · Lord Garmadon's Dark Fortress · Ed & Edna's Scrap N Junk · Lloyd's Treehouse Fortress · Master Wu's Academy · Kiddie Arcade · Buddy's Pizza · Wong's Costume · Hidden Workshop · Marty Oppenheimer School of Performing Arts · Concert Hall · The Serpentine's Underground Fortress · Grand Sensei Dareth's Mojo Dojo · Ninjago Museum of History · Ninjago Doomsday Comix · Temple of Light · Borg Tower · Wind Farms Power Station · Ninjago City Aquarium · Temple of Fortitude · Yang Tavern · Chen's Palace · Kryptarium Prison · Biker Tavern · Steep Wisdom · Ancient Library of Domu · Temple of Airjitzu · Hanging Temple · Borg Store · Vermillion Dome of Doom · Hono Mizu · Oni Temple · Temple of Resurrection · Dareth's Apartment · Royal Palace · Laughy's

Other Realms

Chima · Cloud Kingdom · Cursed Realm · Departed Realm · Djinjago · Realm of Madness · Realm of Oni and Dragons · Underworld

Vehicles

Destiny's Bounty (The Black Bounty · 2.0 · Destiny's Shadow) · Serpentine Bus· Serpentine Train · Ultra Sonic Raider · Samurai Mech · Samurai Mech (Stone Army) · Fire Mech · Earth Driller · Warrior Bike · Garmatron · Wu's Rickshaw · Wu's Ship · Golden Mech · Kai Fighter · Hover-Copter · Lightning Offroader · Destructoid · Proto Sam-X · X-1 Prototype · Chen's Ferry · D.B. Express · Condrai Crusher · Jungle Raider · Blade-Copter · Chen's Blimp · ElectroMech · Clouse's Earth Mech · Roto Jet · R.E.X. · Salvage M.E.C. · Chain Cycle · Mech-enstein · Titan Mech · Nya's Bike · Kai's Bike · Misfortune's Keep · Vermillion Racer · Raid Zeppelin · Sky Shark · Ultra Stealth Raider · Titanium Ninja Tumbler · Rock Roader · Oni Bike · Zane's Bike · Desert Lightning · Samurai VXL · Iron Doom · Vermillion Invader · Ninja Nightcrawler · Dieselnaut · Katana V11

The LEGO Ninjago Movie

Ninjago Island · Ninjago City · Ninjago High School

Other

Imagination · Blade Cup · Illuma-Swords · Lantern · Medallion · Minidroid Chess · Infovision · Map of the Golden Weapons · Map of Dens · Violet Berry Soup · Starfarer · Celestial Clock · Helmet of Shadows · Obsidian Glaive · Blind Man's Eye · Realm Crystal · Temporal Vortex · Cliff Gordon's Guide to Wooing Women · BorgWatch · Dapper Dan · Oni Masks (Vengeance · Deception · Hatred) · Dragon Armor (Helmet · Chestplate · Shield · Dragonbone Blade)