The Lich King was still Archimonde's bitch. He had to follow is orders because he was stuck in an icecube. As a side plot, he was hoping that while going along with everything, he could find an opportunity to assert his own power and break free from Archimonde's pimpery. Enter Arthas, chaos ensues, Burning Legion gets owned, Lich King is freed from popcicle status, long live the Scourge in Northrend, etc etc.
|