The Serpentine's Underground Fortress
Location Inside the Constrictai Tomb
Inhabitants Serpentine (Former)

Skulkin (Current)

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.

The fortress made its first and only appearance in "All of Nothing."


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.


Landmarks, Vehicles, and more


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 · Lord Garmadon's Dimension · The Mountain of Madness · Mega Monster Amusement Park · Spirit Coves · Golden Peaks · Crashcourse Canyon · Glacier Barrens · Stone Army Tomb · Island of Darkness · 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


Four Weapons Blacksmith · Monastery of Spinjitzu · Lord Garmadon's Dark Fortress · Ed & Edna's Scrap N Junk · Lloyd's Treehouse Fortress · Darkley's Boarding School for Bad Boys · Kiddie Arcade · 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 · The Temple of Light · Borg Tower · Wind Farms Power Station · Ninjago City Aquarium · The Temple of Fortitude · Yang Tavern · Chen's Palace · Kryptarium Prison · Steep Wisdom · Domu · Temple of Airjitzu · Hanging Temple · Borg Store

Other Realms

Cursed Realm · Underworld · Dark Realm · Cloud Kingdom · Djinjago · Departed Realm


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

The LEGO Ninjago Movie

Ninjago Island · Ninjago City · Ninjago High School


Imagination · Blade Cup · Violet Berry Soup · Starfarer · Celestial Clock · Helmet of Shadows ·Obsidian Glaive · Blind Man's Eye · Temporal Vortex · Oni Masks

Ad blocker interference detected!

Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers

Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.