One slight change, for clarification's sake. Change "Infected with the Regeneration quality cannot regenerate damage from Smite/ Retibution, but the damage can be healed magically." to "Infected with the Regeneration quality cannot regenerate damage from Smite/ Retibution, but the damage can be healed normally." This still accomplishes your goal of having it be effective against Infected with Regeneration, but allows them to heal at normal healing rates, through use of a medkit/first aid, or through magical means. Doesn't make much sense for an infected without Regeneration to be able to heal the damage by resting up, while one with Regeneration has to rely solely on a magical cure. Especially since you can only use magic once per set of wounds.