Sunbird's Invocation [Ixalan Promos]

$6.80
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Rare

Set:	Ixalan Promos
Type:	Enchantment
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 may 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.