Necromancy is the study of the darker side of magic and the essence of
life. Tissue, blood, and bone all contain the proper sources for this
art. Necromancy allows you to transfer life forces between two people, in
either direction, by performing a 'leech' or a 'sacrifice'. Necromancy
is also involved in allowing one to imbue some magical items with more
energy, and is used in the conjuration of some spells. This is primarily
a necromancer skill.