Illidan Stormrage never stopped being evil.
He sacrificed other mages during the War of the Ancients. He willingly used the souls of others as fuel for a ritual when he was in Outland. He absolutely would have killed anyone if it had achieved his goals. He was and is an interesting character, and the fact that he was so utterly, ruthlessly pragmatic is part of why he’s interesting. Characters like Illidan make things happen.
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