Chromium, the Mutable [Core Set 2019 Prerelease Promos] WTR051-R Set: HeartGold & SoulSilver: Black

Set: HeartGold & SoulSilver: Black Star Promos Type: Colorless Rarity: Black Star Promo

Set: XY: Flashfire Type: Supporter Rarity: Ultra Rare

Set: Sun & Moon: Black Star Promos Type: Colorless Rarity: Black Star Promo Retreat cost: 0

Set: Weatherlight Type: Instant Rarity: Rare Cost: {1}{W} Until end of turn

Set: Sun & Moon: Lost Thunder Type: Colorless Rarity: Secret Rare Retreat cost: Colorless

Chromium, the Mutable [Core Set 2019 Prerelease Promos] WTR051-R Set: HeartGold & SoulSilver: BlackSet: 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.