Inside the Eld Cave!

Thomas: Alright, the heat in here is amazing, and I bet that there's fire-pygmys here. There might even be some traps... And who knows what else is in here... You go first.
After laughing at Thomas for some seconds, you step into the Eld Cave. And you know that he's right, you don't know what's waiting for you in there... After walking for a while, you reach a dead end. Or is it really a dead end? There's two levers in the wall. One red and one blue. Witch one are you going to choose?

The Blue.
The Blue.