![Chromium, the Mutable [Core Set 2019 Prerelease Promos] XY195 Set: Black & White: Dark](https://cdn.shopify.com/s/files/1/0644/7818/3517/files/9c05831c-930a-50cb-814a-eb55cea1db2e.jpg?v=1746702335)
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Set: Black & White: Dark Explorers Type: Water Rarity: Promo Retreat cost: Colorless
Set: Mystery Booster Type: Legendary Creature — Elemental Rarity: Mythic Cost: {G}{U}{R} Protection from white and from black
You may play it this chain link
Exile the top card of your library
Instant Rarity: Promo Class: Runeblade Cost: 0 Create a Runechant token
Chromium, the Mutable [Core Set 2019 Prerelease Promos] XY195 Set: Black & White: DarkSet: 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.