Gul'dan was the first orcish warlock as well as the de facto founder of the Horde. He betrayed both his people and his mentor Ner'zhul to the demon lord Kil'jaeden for personal gain and power, and was directly responsible for the orcs' fall to demonic enslavement and their subsequent invasion of Azeroth. Tutored by the leaders of the Burning Legion, he is considered one of the most powerful warlocks to have ever existed.[7] He founded the Shadow Council and created the first death knights.[2] Gul'dan often referred to himself as "Darkness Incarnate" and "The Destroyer of Dreams."[2][8]