The Blacklight Avatar

One day, Alex Mercer attacked a Blackwatch outpost dealing in wormholes. Then, he found himself in another world, filled to the brim with the screaming souls of his victims. And at the same time, Avatar Korra was dealing with the Rise of the Equalists. But they have friends in black and white uniforms. Can Alex keep his monstrous nature under control? On indefinite hiatus.