Chromium, the Mutable [Core Set 2019 Prerelease Promos] Elemental Creature spells you cast of

Creature spells you cast of the chosen type cost {1} less to cast

but you may put it on top of your library instead of into your graveyard

Let's pull off the chain and take her with us

The slivers would survive

You may reveal a noncreature

Chromium, the Mutable [Core Set 2019 Prerelease Promos] Elemental Creature spells you cast ofSet: 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.