Kil'jaeden is one of the central villains of the Warcraft universe, an eredar lord who commands the Burning Legion in its campaign to consume worlds. He has loomed over the story since the early Warcraft games and became a direct threat in World of Warcraft, most notably as the final boss of the Tomb of Sargeras raid in the Legion expansion. Short, theatrical voice lines from major bosses travel well online, so this single word became a reusable soundboard staple for mock-serious threats, raid jokes and dramatic reveals.