Melmetal (SM181) (Staff Prerelease Promo) [Sun & Moon: Black Star Promos] Base Set Shadowless Unlimited Secret Slayers is an all-foil

Secret Slayers is an all-foil booster set that contains 60 cards:

The cave floods with light

Set: Sun & Moon: Team Up Type: Fire Rarity: Rare Retreat cost: Colorless

Set: Core Set 2020 Prerelease Promos Type: Creature — Nightmare Rarity: Rare Cost: {3}{B} Whenever a Swamp enters the battlefield under your control

Set: Commander 2011 Type: Artifact — Equipment Rarity: Uncommon Cost: {1} Equipped creature gets +1/-1

Melmetal (SM181) (Staff Prerelease Promo) [Sun & Moon: Black Star Promos] Base Set Shadowless Unlimited Secret Slayers is an all-foilSet: Sun & Moon: Black Star Promos Type: Metal Rarity: Promo Retreat cost: Colorless,Colorless,Colorless,Colorless