Chromium, the Mutable [Core Set 2019 Prerelease Promos] Fusion Monster Its effects are not activate

Its effects are not activate at this time

up to the number of Xyz Materials with different names attached to this card

This effect can only be used once while this card is face-up on the field

destroy this card unless you send 1 "Iron Core of Koa'ki Meiru" from your hand to the Graveyard or reveal 1 Dragon-Type monster in your hand

Chromium, the Mutable [Core Set 2019 Prerelease Promos] Fusion Monster Its effects are not activateSet: 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.