History
Kraw the Uncontrollable was the King of the Dark Elves and ruled over Svartalfheim.[1]
During his reign, he had his people at war with the Trolls, a known and notable war being the Forty-Third Troll War who lasted for at least nineteen years (possibly more) and cost thousands of lives, including Malekith's brothers, uncles and father.[1]
The war against the Trolls changed to a war against the Light Elves, then battles at the borders with the Dwarves and terrorism against the Gods.[1]
He was at some point and somehow replaced by Malekith.