Instant
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→ Infinite magecraft triggers, Infinite storm count
→ Infinite storm count, Infinite magecraft triggers
→ Infinite copies of creatures you control, Infinite creature tokens, Infinite ETB
→ Infinite LTB, Infinite ETB, Infinite colored mana
→ Infinite storm count, Infinite magecraft triggers
→ Infinite copies of creatures you control, Infinite creature tokens, Infinite ETB
Change of Heart will not remove an already attacking creature from combat. It must be cast before attackers are declared or it won’t have any noticeable effect on the game.
(You may pay an additional as you cast this spell. If you do, put this card into your hand as it resolves.)