Beneath the Sanctuary of Rock and Lava
Well, I say that you are a thief! A thief and a liar, to boot! Prepare to die!—Foutch, Rayman 2: The Great Escape (PlayStation version)
Beneath the Sanctuary of Rock and Lava is a level in Rayman 2: The Great Escape. It is a continuation of the previous level, the Sanctuary of Rock and Lava as it is set inside the same temple, and it is where the third of Polokus' masks is really hidden. It is also the only levels in the game in which Rayman can use his helicopter to fly, except for in Rayman Revolution. In Rayman Revolution, it is known as Beneath the Lava Sanctuary or Beneath the Sanctuary of Lava.
This is an underground level which consists of long rivers of lava and thorny tunnels, which Rayman cannot pass without flying. At the beginning of the level, Ly the Fairy appears before him and grants him the power to use his helicopter to fly with a Silver Lum. Often throughout the level Rayman is blown away by giant fans, and he has to keep his flight under control to prevent damage to himself.
By the end of the level, he encounters Foutch, who knocks him down with such a forceful blow that he loses this power (only by playing the level again, the power can be used again, but it won't work outside the level). After a fight against Foutch, he is finally rewarded with the third mask. In Rayman Revolution, Rayman regains the super helicopter power to fly above lava.
After defeating Foutch and taking the third Mask, phase 3 is no longer accessible. The Spiral Door that serves as the exit of the level will be placed on to the door that would previously lead to phase 3. The only exception is the Playstation version, where it's possible to fight Foutch again.
Rayman falls out of a Teensie portal from the ceiling into a room beneath the Sanctuary of Rock and Lava. He looks around the room, only to find that before him is a pit of lava, while above, there is a tunnel of nettles - either way, he is trapped. Rayman remains stumped, until Ly the Fairy appears to deliver good news and bad news. The good news is that she has gathered enough energy to create a Silver Lum, which gives him the power to fly with his Helicopter. The bad news is that his mission will be much harder. Finally, Ly whisks herself away, leaving Rayman to try out his new power.
Underneath the spot Rayman is standing on, is a corridor with a cage at the end. Then Rayman will fly through the tunnel of thorns, shooting any nettles and baby caterpillars that come in his way. Eventually, he will reach a safe spot to stand on, and to his left there is a giant fan. If he jumps and activates the Helicopter, he'll be blown away through more thorny tunnels, as well as having to dodge stone flame throwers. These thorny corridors and pits of lava will carry on, until he enters a room with falls of yellow lava, which is even more deadlier to come to contact with. He'll eventually arrive on safe ground again, and come across a stone coming from the ceiling with a slanted side. The trick is to shoot this side to rebound shots that will break the stone that is blocking the hole on the ground, which he'll finally descend.
Rayman will come across another fan which will blow him down a corridor with a river of lava, dodging yellow lava falls and then thorny thickets that try to block the passage. Eventually, there is a large opening on the walls of the nettles, in which two cages are found. Then he'll continue flying down the corridor, shooting away some nettles until he reaches a breakable stone door, which somehow opens up for him, but then shuts. Looking around for what to do next in this new room, Foutch, the Guardian of the Sanctuary of Rock and Lava, creeps up on him from behind and delivers a forceful blow that sends the limbless hero down a pit of yellow lava.
Main article: Foutch
Still falling to the ground, Rayman realises that the blow had been so powerful that he cannot fly anymore, and the battle with Foutch begins. Rayman will have to run around the room, avoiding the Guardian's columns and rows of fire, while using cobwebs to bounce up and shoot a stalactite from the ceiling to inflict damage. Once Foutch is defeated, a Purple Lum will be released, and used to reach higher ground, which finally leads to the Third Mask.
This level is identical to that of the original version, except that it features Robo-pirates, which is the case for none of the other versions.
This level bears much resemblance to that of the original version but with the following differences:
PlayStation 2 version
While much of this level remains the same as that of the original; one difference is that rather than losing the Super Helicopter power completely, Rayman partially recovers it after the battle with Foutch so that he can still fly in the rising hot air emanating from bodies of lava.
The cutscene introducing Foutch appears to have not been updated from the original versions of Rayman 2: it still labels Foutch as "Guardian of the Sanctuary of Rock and Lava", even though the level itself is referred to in the game as "The Lava Sanctuary".