Oh. Yeah. Well he uses cards for combat. For instance a demon themed deck. Each card has a different ability that has as many uses as charges. Each has a God or Goddess and a King or Queen. 

Currently my main issue is to whether I have him play the cards like YGO or whether he holds and charges them before usage. Currently I have it towards the former, though the last bit may help more with defensive purposes. Another issue is his defenses as the cards are his weapons and physically he won't be much to talk about.