At this moment of desperation, the human mage (possessed by Sargeras) contacted Gul'dan from the world of Azeroth . Together, they opened the Dark Portal , and the green-skinned tide spilled through, beginning the invasion that would change the fate of the universe forever.

Far away in the Twisting Nether, the demon lord was hunting the Draenei. When he discovered them on Draenor, he saw an opportunity to kill two birds with one stone: destroy his ancient enemies (the Draenei) and gain a mortal army for the Burning Legion.

Kil'jaeden appeared to the elder shaman in the guise of his deceased wife’s spirit. He convinced Ner'zhul that the Draenei were plotting against the Orcs. Trusting his "ancestors," Ner'zhul began uniting the clans into a single war machine. The Corruption