Nearing an altar
Looking around this dimly lit tunnel, there isn't much at first glance. Eerie light creeps through the walls made of porous basalt, which have sinister looking carvings on them, depicting an Armageddon. Faint words are written sporadically in an unknown language, implying only a tale of impending doom. An ominous glow comes from the south, flickering a greenish yellow. The northeast corner of the tunnel emits magical shadows that surround a metallic snake, the sun in it's jaws, rising from the ground itself.
[ Exits: west, south ]

Someone build off of me, it's a tunnel region in the Underdark.