As an additional cost to cast this spell, you may sacrifice any number of Spirits.
Target creature gets +3/+0 until end of turn. For each Spirit sacrificed this way, that creature gets an additional +3/+0 until end of turn.
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Strike It Rich
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Create a Treasure token. (It's an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") Flashback {2}{R} (You may cast this car...
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Sylvan Scrying
Battle for Zendikar
Search your library for a land card, reveal it, and put it into your hand. Then shuffle your library.
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Sylvan Awakening
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Until your next turn, all lands you control become 2/2 Elemental creatures with reach, indestructible, and haste. They're still lands.
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Sylvan Anthem - Showcase
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Green creatures you control get +1/+1. Whenever a green creature enters the battlefield under your control, scry 1.
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Swords to Plowshares
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Exile target creature. Its controller gains life equal to its power.