Long before the light appeared, the Nine Realms, then shrouded in darkness, gave birth to the Dark Elves.
A thousand years ago, Malekith, having obtained the Aether (Reality Stone), became the King of the Dark Elves, desiring to lead them to rule the Nine Realms once more.
The power of the Reality Stone is immense; it allows the user to realize any wish, rendering all scientific principles and natural laws meaningless in its presence.
Chapter 160