Deathstroke

Short bio: I am an ex military fighting specialist who had to leave the military to raise my son, Joseph. I turned to hunting, becoming a world famous safari hunter. When my son gets kidnapped and gets killed, my wife and I get gassed by a grenade, leaving my wife insane and giving me superhuman regeneration, speed, dexterity, and senses. After my wife tries to kill me, I become an assassin with a group of world wide mercenaries and quickly become the best assassin in the world. I get rid of the name Slade and become Deathstroke the terminator.