The Runestaff is one of three sentient, and extremely powerful, key artifacts appearing in Michael Moorcock's Eternal Champion multiverse.

The Runestaff manipulates the world so that so that it maintains a certain balance of power. Should the balance of power be tipped, as with Granbretan's extremely powerful empire in the Dorian Hawkmoon chronicles, the Runestaff will manipulate the very threads of Fate to correct it. It also projects stars and other impressive lighting effects, like a portable planetarium.

Sometimes it's soul will jump out and for a look around. It manifests itself as a boy with oriental features named Jherek Carnelien.