Xmas upgrade (eugh, amirite?).

He can disperse blood into the air around him. Radius 10m. The area of effect shimmers in white, glassy mist and simply walking through and breathing in the iron tang of blood will apply the regenerative effect. Lingering in the field for even longer acts as increasing the dosage and will compound the speed of healing (a quick dash through the field will take care of uncomfortable nicks and scrapes; 1-2 minutes will repair deeper cuts; roughly 4-5 minutes will heal more severe injuries [deep puncture wound, etc.]; 10 minutes and counting for extreme damage/dismemberment).

This method requires much more blood loss than direct consumption (he can't control how far the spread is) and, once deactivated, the remaining blood in the air does not return to him.