Ephemerate (Japanese) [Strixhaven: Mystical Archive] Urza's every appendage becomes an additional

every appendage becomes an additional mouth

double the number of +1/+1 counters on Primordial Hydra

If you saw her

Set: Murders at Karlov Manor Promos Type: Enchantment Rarity: Rare Cost: {U} Activated abilities of creatures you control cost 2 less to activate

You're trying to cast a spell

Ephemerate (Japanese) [Strixhaven: Mystical Archive] Urza's every appendage becomes an additionalSet: Strixhaven: Mystical Archive Type: Instant Rarity: Rare Cost: {W} Exile target creature you control, then return it to the battlefield under its owner's control. Rebound (If you cast this spell from your hand, exile it as it resolves. At the beginning of your next upkeep, you may cast this card from exile without paying its mana cost.)