Sunbird's Invocation [Ixalan Prerelease Promos] Theros except it's an artifact in

except it's an artifact in addition to its other types

If the player doesn't

search that player's library for an artifact card and exile it

its maw becomes primed with acid and a taste for brains

Sunbird's Invocation [Ixalan Prerelease Promos] Theros except it's an artifact inSet: Ixalan Prerelease Promos Type: Enchantment Rarity: 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 mana value. You may cast a spell with mana value 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.