That doesn't sound right. By the time the Horde were going through the Dark Portal, the spirits refused to answer their calls, and they had instead turned to using Fel. Those who were once shaman were now warlocks. But Azeroth had plenty of shamans of its own among Tauren and Trolls, as well as Pandaren, Goblins, Centaur, Wildhammer dwarves, and so on.Most historians agree that shamanic practices were introduced by the Horde invading Azeroth from Draenor via the Dark Portal.