Creature catalogue: the Mokuth

Mokuth 18HD*; AC -1; MV 0' (Gate); AT 1 Bite or Water breath; DA 1d6+2hp/round or 18d6 water blast; NA 0(1); SA Magic-user L18; ML 11; TT Special; INT 18;

Description: A Sentient otherplanar creature, it can open a gate into a dungeon and poke its head through pouring in water to drown the occupants until they pay up a magic ring, at which it retreats back through the gate allowing it to close. If Attacked and reduced to a quarter of its hitpoints, it will gate away to a new location.