TRIAGE
Real Name: Christopher Muse
First Appearance: All-New X-Men (Vol. 1) #1, January 2013
Powers: Triage has the mutant ability to manipulate entropic forces. This allows him to heal himself and others on contact or through close proximity. His power operates through an infusion of life-force energy, similar to Dagger. This excess living energy is absorbed by the injured party and turned towards revitalizing them and accelerating the natural healing processes of the body. Not only can he heal almost any injury, Triage can even restore the recently deceased by rekindling the energy of life inside their bodies with his life-force infusions. If he catches someone a few moments after death, they will fully recover as if they hadn't died at all.
If someone has been dead for a period of time, however, Triage cannot fully reverse the cellular decay which sets in after the body fails. Instead, he creates something akin to a zombie, reanimating the deceased's physical frame and at least an echo of their mind. The life-force cannot be rekindled in bodies like this, so it seems more like Triage's energy infusion serves as an independent animating force for the "zombie". Having only done so once, it's unknown how long a person will last in this state, but presumably it would be only a temporary reanimation as the life-force infusion fades.