Faust, Love of the Damned
When John's girlfriend is brutally murdered, he vows to avenge her death any way he can.  When the mysterious M appears and offers a solution, John hastily agrees and signs the deal, in blood.  Suddenly, John has powers he can't even control, much less understand.  The violent urges, the razor-sharp claws, the constant pain, and the pulsating scar on the palm of his hand--his constant reminder that everything has its price.  Based on the graphic novel and cult comic by David Quinn and Tim Vigil, directed by Brian Yuzna (Return of the Living Dead 3).