Chromium, the Mutable [Core Set 2019 Prerelease Promos] 24a and sent from your side

and sent from your side of the field to your Graveyard

return it to the battlefield under its owner's control with a -1/-1 counter on it

Set: Sun & Moon: Cosmic Eclipse Type: Water Rarity: Ultra Rare Retreat cost: Colorless

Set: Crimson Crisis Card type: Effect Monster Rarity: Ultra Rare Attack: 3500 Defense: 2500 This card cannot be Normal Summoned or Set

Chromium, the Mutable [Core Set 2019 Prerelease Promos] 24a and sent from your sideSet: Core Set 2019 Prerelease Promos Type: Legendary Creature Elder Dragon Rarity: Mythic Cost: {4}{W}{U}{B} Flash This spell can't be countered. Flying Discard a card: Until end of turn, Chromium, the Mutable becomes a Human with base power and toughness 1 1, loses all abilities, and gains hexproof. It can't be blocked this turn.