Create undead

Create undead is a necromancy spell that allows the caster to bring into being a ghoul, ghast, mummy or mohrg depending on his or her power. It must be cast at night. The undead that the spell creates is not necessarily obedient to its master so it is often necessary to possess the power to command the undead before casting this spell. In order for the spell to be cast, it must be cast on one a corpse, and an onyx gem must have been placed in one of the corpse's eye sockets. The more powerful undead being created, the more valuable the gem must be. The gem is consumed by the spell. The caster must also have two clay pots, one filled with grave dirt and the other with brackish water.