Serpentine's underground fortress

The Serpentine's underground fortress (also referred to as the Serpentine's inner sanctumAll of Nothing#Synopsis) is a massive subterranean lair, built inside the Mountain of a Million Steps 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 are three 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.
==Appearances==
===Ninjago: Masters of Spinjitzu===
====Season 1: Rise of the Snakes====
*11. "All of Nothing"
==Gallery==
===In Ninjago: Masters of Spinjitzu===
Screenshot (2401).png|A hologram of the caves forming the fortress.
SUF2.png
SUF3.png
SUF4.png
SUF5.png
SUF6.png
SUF7.png
2Generals.png
3Generals.png
4ColeSkalidor.png
5KaiHypnobrai.png
6JayFangtom.png
7ZaneCornered.png
8PythorFangBlade.png
9PythorFangBlades.png
10Acidicus.png
11PythorSkales.png
12MezmoChokun.png
13PythorKai.png
14SerpentineLloyd.png
15PythorLaugh.png
16PythorAttack.png
18PythorGarmadon.png
19PythorDisappear.png
===Concept art===
NINJAGO SETS Mountain of a million steps inner sanctumcopyright.jpg
Serpentine Underground Fortress (Concept Art).jpg
==References==
Category:Locations
Category:2012
Category:Serpentine
Category:Constrictai
Category:Venomari
Category:Fangpyre
Category:Hypnobrai
Category:Anacondrai
Category:Rise of the Snakes
de:Unterirdische Festung
ru:Подземная Крепость Серпентинов