Book 14 in The Tale of the Eternal Champion. Three stories: Count Brass, The Champion of Garathorn and The Quest for Tanelorn.
As both hero and heroine, the Eternal Champion must test the limits of reality, trade illusion for more illusion, all in a desperate bid to regain a lost love and come at last to the fabled city of tranquility, Tanelorn.  But first the avatars of the Champion – Elric, Corum, Hawkmoon, Erekose and others must pool their strength and swords, their wisdom and courage in order to bring about the Conjunction of the Million Spheres, the most mighty change in the order of the multiverse.