Reaper

Approximately one hundred years after the end of the world, humanity is starting to come back. However, something is giving rise to a new form of human, known as the Powered, who have spectacular abilities.   In the spirit world, ghosts are shuffled off the mortal coil by White Reapers. Very occasionally insane ghosts known as Avadis are created, and are contained by Guardians and fought by Black Reapers. The appearance of the Powered has created Powered ghosts and Avadis, which the Black Reapers can't fight, and Guardians can only contain in groups of three.   Compounding the problem is a group known as the Right Hand, which purposefully goes about creating Powered Avadis for reasons yet unknown.