Satan

Satan is the step above Dark Forms and Evil Deities. One that is meant to represent the source of ALL Evil, the highest authority over Hell; one that is Darkness and corruption incarnate within his or her world, much like the Evil Counterpart of the Supreme Beings. This is an often all-powerful (or extremely potent) being that plays with the lives of others and takes delight in ruining the world they inhabit and the beings found here. In short, this is meant to represent Satan himself or his closest in-universe counterparts - no less. And sometimes this villain will even be similar to the Devil in his or her actions.