A spell that increase the damage of any bladed weapon it is cast on for the duration of a fight. It costs endurance from an endurance reserve to cast, but not to maintain or use once cast. It requires concentration, gestures, vocalization and a focus to cast, but not to maintain or use once cast. It takes extra time to cast, but not to use once cast.
I thought HKA was the way to go, but I think that would require endurance, concentration, gestures, etc. for each swing.
I thought using 3 pt. combat skill levels as a power might work, limited to only increase DC and cost endurance, but then it seems to be so much a better deal than HKA that I thought I must be missing something.
Any thoughts?