As far as I know, this is the origin of the the magic that involves communicating with spirits and reanimating the dead. Additionally, the necromancers, as students of Trag'Oul's teachings, strive to preserver the "balance" in Sanctuary.
So now we have the witch doctors. They also are tasked with preserving the balance between Sanctuary and the "unformed land." They communicate with spirits and reanimate the dead.
Is there any link between the first witch doctors and necromancers? Other than the proximity between where witch doctors reside and where necromancers reside (in the same jungle?), is there direct contact between them? My assumption would be that the source of the witch doctor's power is the same as the necromancer's: Trag'Oul. I would also assume that necromancers existed first... so did a rogue necromancer teach the tribes how to commune with spirits? Did Rathma or Mendeln reach out to the tribes to teach them or was the knowledge stolen and then altered to take the form practiced by the witch doctors? Am I just missing some obvious piece of existing lore?
Thanks for the help!