Polymorphous Rush [Journey into Nyx] Elemental Rogue Set: Magic Origins Type: Creature

Set: Magic Origins Type: Creature — Angel Rarity: Mythic Cost: {1}{W}{W}{W} Flying

if a nontoken creature would enter the battlefield and it wasn't cast

Set: Conspiracy: Take the Crown Type: Sorcery Rarity: Rare Cost: {4}{U} Reveal the top three cards of your library

or I shall master it for you

Polymorphous Rush [Journey into Nyx] Elemental Rogue Set: Magic Origins Type: CreatureSet: Journey into Nyx Type: Instant Rarity: Rare Cost: {2}{U} Strive This spell costs {1}{U} more to cast for each target beyond the first. Choose a creature on the battlefield. Any number of target creatures you control each become a copy of that creature until end of turn.