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The only thing I can think of, which may not even work, is have it store all heroes HP into separate variables on every turn, and on monster turns have it store the HP into different variables. Then check if both of one heroes' HP variables are the same, if not, have an animation, condition, set HP reduction combo, which was previously mentioned.However, I havent done much in RPG maker for awhile, so I am not sure if this can be done anyway.