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Darksteel MutationCasting Cost: Card Type: Enchantment - AuraCard Text

Each creature you tap while casting this spell pays for or one mana of that creature's color.) You may have this creature enter as a copy of any creature on the battlefield, except is has changeling.

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Pursuant to subsection 3.1(4) of Richards Rules of Order, at the beginning of the upkeep of each participant in this game of the Magic: The Gathering trading card game (hereafter known as PLAYER), that PLAYER performs all actions in the sequence of previously added actions (hereafter known as ACTION QUEUE), in the order those actions were added, then adds another action to the end of the ACTION QUEUE