This is Rat. One of the protagonists of my own dark fantasy comic 'Blood of the Gods'. He is a young adult who happens to become possessed by the spirit of destruction. This has stopped him from aging as well as giving him the ability to tap into the powers of destruction, including various pyrokinetic techniques, incredible strength and the ability to multiply. He's a bit of an angry bastard due to his harsh upbringing, but all his anger is justified (to him atleast).