The Eternal Champion (concept)
The Eternal Champion is a fictional creation of Michael Moorcock and is a recurrent character in many of his stories.
The Multiverse, which consists of parallel universes, multi scaled dimensions, spheres, and times, is the place where the eternal struggle between Law and Chaos occurs. The forces war constantly for supremacy, but the victory of either would be disastrous for the fate of the Multiverse. Separating and regulating the forces is the Cosmic Balance.
The Eternal Champion, a hero (or sometimes an anti-hero), who exists in all dimensions, times and worlds, is the one who is chosen by fate to fight for the Balance; however, he often doesn't know of his rôle, or, even worse, he struggles against it.
All the Incarnations of the Eternal Champion are facets of each other. The Champion appears to be also incarnated, on occasion, as Companion to another of his incarnations, or as Champion for the opposing force.