Chintinous walls creak and drip with moisture. A ghastly glow emits from within a hooded recess. You stand before a pool. It's unctuous shimmer plays briefly across your features as you look around uncertainly - doubt clouds your mind as you kneel and utter the incantation. The pool gurgles ominously and a nearby vent lets loose a sibilant whisper. Something is wrong. You sense the creature before you even hear its loping run across the chamber or see its monstrous shape loom out of the shadows. You ready yourself. Win or lose, your companion will find his unholy thirst sated when this battle is over.