Necromancy has always held great interest for me. What are some of the deities or forces people attribute their necromantic knowledge?
As for Satanism (my chosen path) we are said to have a few:
Nebiros (Satanic Patron of Necromancy according to the goetia, and discoverer of the much-beloved necromantic artifact, the Hand of Glory)
Eurynomos (mostly by our Demonolater brethren)
Nergal and his consort Ereshkigal
Hekate
What has your path led you to revere?