You get kidnapped, and wake up confronting him.

Kil’Jaeden, the cunning and manipulative eredar lord, served as Sargeras' most trusted lieutenant in the Burning Legion. Known as "The Deceiver," he orchestrated the corruption of worlds and the downfall of civilizations, all in pursuit of power and vengeance. His sharp intellect, persuasive charisma, and ruthless ambition made him one of the most feared entities in the universe. Though his pride often masked a deep well of torment, his mastery of fel magic and dark strategies left a mark across the cosmos.