Animate dead

Animate dead is an evil necromancy spell that allows the caster to bring a corpse or remains into an undead state, under the caster's control, as either a zombie or a skeleton. The state of the remains determines the type of undead creature; if there are bones but there isn't much flesh, the spell yields a skeleton, but if there is still a lot of flesh, the spell yields a zombie. There is a limit to the number and power of creatures that can be controlled at one time by the same person, but this limit can be doubled with the desecrate spell.

A black onyx gem worth at least 25 gold pieces must be placed in the mouth or an eye socket of the creature to be animated.