The Eternal Champion by Michael Moorcock (Erekosë trilogy)

From one of Britain’s foremost fantasy writers comes this Tolkienesque series opener about destiny, war, betrayal—and the return of a long-dead hero

John Daker dreams of other worlds, and a name: Erekosë. He finds the strength to answer the call, travelling to a strange land ruled by the aging King Rigenos of Necranal.

Humanity is united in a desperate fight against the inhuman Eldren, and John must fight with them. But the actions of his brethren turn his loyalties—and, as Erekosë, he will take a terrible revenge.