Polymorphine — You may have Callidus Assassin enter the battlefield tapped as a copy of any creature on the battlefield
Set: Skyridge Type: Colorless Rarity: Common Retreat cost: Colorless
Set: Base Set Unlimited Type: Lightning Rarity: Promo Retreat cost: Colorless
Set: Streets of New Capenna Commander Type: Instant Rarity: Rare Cost: {X}{W}{W} Create X 1/1 green and white Citizen creature tokens
Set: Jumpstart 2022 Type: Legendary Creature — Unicorn Rarity: Mythic Cost: {2}{W}{W} {3}: Exile another target creature you control
Boseiju, Who Endures (Extended Art) [Kamigawa: Neon Dynasty] POP Series 3 Polymorphine — You may haveSet: Kamigawa: Neon Dynasty Type: Legendary Land Rarity: Rare {T}: Add {G}. Channel {1}{G}, Discard Boseiju, Who Endures: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs {1} less to activate for each legendary creature you control.