Played with a friend last night who was using the priestess and a mage wand bound to a group heal spell. Since group heal spell is a holy incantation, every time he cast it from the wand the priestess player invoked Divine Reward and quickly had a huge amount of life. This seemed like an odd application of the rule, but correct as I read it. Can divine reward be used this way( and yes, I know I should have dissolved the wand early, but that's not the discussion I want to have right now)?