Ghost of the Well of Souls — Jack L. Chalker

On the mysterious Well World, the evil tyrant Josich and his dark agents search desperately for the eight scattered pieces of the fabled Straight Gate. Whoever possesses the Gate will wield enormous power, traveling between universes at the speed of light and wreaking havoc across galaxies.

Opposing Josich is a small band of travelers new to the Well World. There is Core, once a machine, now flesh and blood; Ming and Ari, two minds sharing a single body; Jaysu, an angel; and Genghis O'Leary, a lizard being. Unbeknownst to them, they have an unlikely ally: a vengeful entity who is able to clone any person or object with a single touch--and mete out death just as swift ...