Excellent thanks Eli! That should save us another one and half hour argument

Hi Just for further clarification (as my friends decided that your todify example wasn't relevant!)… If player A casts Siphon Strength on player B, and then player B casts Hydra and decides that the spell also affects player A what would the result be. Player A in the scenario believes that the spell would have no effect on him since he cast the spell and would effectively be siphoning strength from himself. Player B believed that the spell would cancel out since Player A would siphon from Player B and player B would Siphon from Player A. Thanks