Kil'jaeden

Kil'jaeden (pronounced Kill-Jay-Den) is a powerful eredar demon lord and is the acting leader of the Burning Legion. Selected twenty-five thousand years ago as the chief lieutenant of Sargeras, he was ranked above the now-deceased demon lord, Archimonde.[3][4][5] While Archimonde had led the Legion's armies, Kil'jaeden's agenda was to assimilate every race possible into the folds of the Burning Legion. Since the apparent banishment of Sargeras, he has assumed the role of supreme commander.

He is also the creator of the Lich King.

Twenty-five millennia ago, the world of Argus was the home of the wondrous eredar civilization, a race of natural magic-wielders. Kil'jaeden, respected for his intelligence, a genius among a race of geniuses, quickly rose to become one of the three most prominent leaders of the eredar, along with his colleague Archimonde and best friend, Velen.

Kil'jaeden had loved Velen as a brother.[6] Eredar society was shattered when these three leaders were contacted by Sargeras the Destroyer. Sargeras offered a deal: in exchange for their loyalty, the eredar would gain untold power and prestige. Kil'jaeden and Archimonde readily accepted, though Velen held back.

As the eredar were preparing to receive their new powers, Kil'jaeden learned that Velen and his followers had sided with Sargeras's enemies, the naaru, and were in the process of fleeing Argus. Enraged by this "betrayal" Kil'jaeden loosed his new powers and minions on the "Exiled Ones", or draenei, and relentlessly pursued them across the cosmos for five thousand years... but Velen was as cunning as the Deceiver, and the draenei soon vanished.

Archimonde

Archimonde (pronounced Ark-i-mond) was the left hand of the fallen titan Sargeras. Archimonde was one of the greatest and darkest of the eredar. His ruthless and cunning personality quickly earned him station and power within the eredar ranks, until finally he was one of the first among them. He is described as one of the lieutenants[3][4] and generals[5] of Sargeras.

wenty-five thousand years ago, Archimonde was one of the three leaders (the others being Kil'jaeden and Velen) of the eredar homeworld of Argus. The three rulers were contacted by Sargeras and offered immense power in exchange for their loyalty. Archimonde and Kil'jaeden readily accepted the offer, though Velen not only rejected it, but rebelled and fled Argus with his followers to become the Draenei.

Archimonde was appointed as the field commander of the Legion's forces, directing troop movements and overseeing military invasions. Kil'jaeden was charged with more covert operations and recruiting new races and minions into the Legion. Due to their positions, Kil'jaeden and Archimonde each built their own hierarchy of demons that acted as if competitors. Pit lords, doomguards, and eminences served under Archimonde and the dreadlords, while risen terrors[citation needed] and shadow priests followed Kil'jaeden.[6]