Rulkan

Rulkan was the mate of Ner'zhul before she died an unknown death. Kil'jaeden, using information gained through his scout Talgath, impersonated her spirit. She was the one who told him about the false draenei threat, and of Kil'jaeden. Sometime later Ner'zhul encountered the real Rulkan (who, as with the spirits of most orcs was living an afterlife in Oshu'gun), but she looked upon him in hatred and would not have anything to do with him.