Sunbird's Invocation [Ixalan]

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Set: Ixalan Type: Enchantment Rare Cost: {5}{R} Whenever you cast a spell from your hand, reveal the top X cards of your library, where X is that spell's converted mana cost. You m ay cast a spell with converted mana cost X or less from among cards revealed this way without paying its mana cost. Put the rest on the bottom of your library in a random order. Show more