Sunbird's Invocation [Ixalan Prerelease Promos] Human Pirate Whenever a Dragon you control

Whenever a Dragon you control dies while Boneyard Scourge is in your graveyard

An explorer of the Æther

instead forcing them to take on its form

ten catapults

"The scythe of time or my blade at your throat—the choice is yours

Sunbird's Invocation [Ixalan Prerelease Promos] Human Pirate Whenever a Dragon you controlSet: 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.