The Dragon in the Sword — Michael Moorcock

The Eternal Champion née John Daker embarks on another journey throughout the multiverse, seeking his freedom and his love, in this final installment of Moorcock's epic fantasy trilogy
 
Trapped in a timeless existence, doomed to fight forever, John Daker is the Eternal Champion.
 
Haunted by memories of too many battles waged during infinite lifetimes, he has taken Fate into his own hands. He searches for Ermizhad -- and for the key that will free him from psychic captivity.
 
On a dark ship piloted by a blind helmsman, the Eternal Champion must stand and fight the darkest battle in the history of the world . . .