Achilles Heel: Dark Soul

Achilles heel: Dark Soul by Dragon blaze 99

The character has a unusual flaw in that when he goes to sleep or is knocked unconscious this body metamorphs into another super being of opposite alignment and with different powers, this villain the goes about committing crimes, the new being is totally different then the original hero with different but somewhat similar powers and different look and finger prints, the other from will try to make it back to were the hero fell a sleep or was ko so the does not know, to make things stranger the Hero will view this other self as his nemesis and will work had to capture this evil scum, this is not just an insanity that can be cured but another persons soul and some of their physical essence with in the same body.