Transforming Flourish

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Card Text

Demonstrate <em>(When you cast this spell, you may copy it. If you do, choose an opponent to also copy it. Players may choose new targets for their copies.)</em> <br>Destroy target artifact or creature you don't control. If that permanent is destroyed this way, its controller exiles cards from the top of their library until they exile a nonland card, then they may cast that card without paying its mana cost.