Gachiakuta 4 (manga)

Rudo was falsely accused of murder, and his wrongful conviction led to an unimaginable punishment--exile off the edge, along with the rest of the trash. Down on the surface, the cast-off waste of humanity has bred vicious monsters, and if Rudo wants to have any hope of discovering the truth and seeking vengeance against those who cast him into Hell, he’ll need to master new powers in this latest volume!