Yyrkoon

Yyrkoon is a villain from the Elric of Melnibonè series of fantasy novels by Michael Moorcock.

Yyrkoon is a prince of the empire of Melnibonè and cousin of Elric, the 428th emperor of Melnibonè. He has Mournblade, the sister sword of Elric's Stormbringer and has the same soul stealing powers of her sister.

Yyrkoon hated and envied his cousin Elric who sees as unworthy to rule Melnibonè and tried several times to ruin him.