After all, the first dungeon Kane experienced had the sun replaced directly by the Golden Bridge spanning the horizon; such an environmental change isn't considered too absurd.
And now, the information obtained explains why this is the case.
Initially, everything about this dungeon, including the geographical environment and the species above, was not naturally generated at all, but rather manmade.
The primary purpose of this area was experimental, and the Sky Island and this relic here serve as the central control area and information storage area for the region.
The original world should have been one where magic and machinery were highly integrated and developed; they modified this region into areas with different environments using various extraordinary magic machinery devices.
