Five thousand years ago, a cosmic event known as the "Convergence" occurred. Malekith, the leader of the Dark Elves at the time, sought to use this event to release the Aether, a force of extreme power from before the universe existed. Malekith's goal was to plunge the Nine Realms into an eternal darkness. However, before Malekith could achieve his goal, Asgardians led by All-Father Bor intervened, and took the Aether. Thus, a battle with the Dark Elves began. Coincidentally, Thor was in Asgard and came face to face with Malekith, who was invading the Realm's main building. Everyone nodded.