Juiblex

Juiblex, aka Jubilex, is one of those characters you do not want to mess with. He can engulf and sicken any character he meets, and will spit acid venom at you. Like other demon lords, he can and will teleport to meet you. Dealing with him is quite simple, you need only a unihorn, a wand of digging, and a weapon of some kind. When he engulfs you, zap him with the wand, then hit him once and he will die. He is also vulnerable to stoning.