Chromium, the Mutable [Core Set 2019 Prerelease Promos] Fusion Monster You can only use this

You can only use this effect of "Toon Harpie Lady" once per turn

send 1 DARK monster from your Deck to the Graveyard

When a monster effect is activated (Quick Effect): You can send 1 face-up Equip Card you control to the GY

Set: Sun & Moon: Guardians Rising Type: Lightning Rarity: Secret Rare Retreat cost: Colorless

if this card attacks a face-up Defense Position monster: Destroy that monster immediately (without damage calculation)

Chromium, the Mutable [Core Set 2019 Prerelease Promos] Fusion Monster You can only use thisSet: 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.