heart of darkness.

I have encountered this in my thoughts and travels (between realms, spiritual, physical and astral) wherein it knows no foe it cannot beat. However I have devised a cure.

The heart of darkness is extremely all about enjoying being evil, once the brain body and mind are sufficiently corrupted, the conscience is silenced and right and wrong kind of switch around. The oddest part is that evil people actually have a complicated evil moral to devise about. 

This can be the inkling of the cure, a shrapnel from the natural state (of good) endures and can be appealed to. Its a complex task.