Skinship-based healing. By pressing his hand, arm, knee, cheek, whatever of his own skin against someone's wound, he's able to accelerate the healing process. Has to hold this direct contact for an uncomfortably long amount of time for an injury to fully heal (like five minutes, an hour, idk. We ain't wolverine healing we deadpool healing).

The limitation joke here is that he'll be regaining his metal body over the course of the game so the applicable sections of skin are going to be steadily reducing.