Withengar

Withengar's avatar from Magic Online Dark Ascension Release Events

Withengar, or Withengar Unbound, is powerful demon lord from the plane Innistrad. He is infamous for slaying Saint Traft, among others. Once, his essence was imprisoned in a magical blade called Elbrus, the Binding Blade.

Trivia

Withengar is based on the demonic sword Stormbringer].