Three years of peace transpired after Rilk defeated the Dark Lord Vanko, but while Mary was a genuine double-agent who wanted to make Rilk, her surrogate little brother, strong enough to defeat Vanko, Marvin was actually a triple-agent who agreed with Vanko's ideals the entire time. With a forbidden spell that he learned from Vanko before his death, Marvin absorbs enough demons in Hell to become Satan, the Devil himself. The spell triggers a magical...