Mistform Shrieker [Mystery Booster] Frog Horror put each of those cards

put each of those cards into your hand instead

then the choices are revealed

When Floodgate leaves the battlefield

most older than Strixhaven itself and many still guarded by soldiers from the Blood Age

Discard a card: Guardian of New Benalia gains indestructible until end of turn

Mistform Shrieker [Mystery Booster] Frog Horror put each of those cardsSet: Mystery Booster Type: Creature Illusion Rarity: Uncommon Cost: {3}{U}{U} Flying {1}: Mistform Shrieker becomes the creature type of your choice until end of turn. Morph {3}{U}{U} (You may cast this card face down as a 2 2 creature for {3}. Turn it face up any time for its morph cost.)