Ghast
Creature
The Ghast is what a Ghoul becomes when its haunt is old and foul enough to nurture something worse: a greater corpse-eater, stronger, quicker, and possessed of a low cunning that the mindless ghoul lacks. A reek hangs about it so vile that it sickens those who come near, fouling the air of its lair, and it often commands a clutch of lesser ghouls who defer to its strength and share its hunts. To find a Ghast is to find a corpse-haunt that has been left to rot and curdle for a very long time, and to know that whatever made the place is still at work in it.