Stitcher's Supplier (Borderless) [Secret Lair Drop Series] Collector −7: You may cast up

−7: You may cast up to three spells from among face-up cards your opponents own from exile without paying their mana costs

the Mutable becomes a Human with base power and toughness 1/1

Set: Core Set 2021 Prerelease Promos Type: Legendary Creature — Human Monk Rarity: Rare Cost: {2}{G} You may play two additional lands on each of your turns

Set: Diamond & Pearl: Stormfront Type: Fighting Rarity: Ultra Rare Retreat cost: Colorless

If it's a Goblin creature card

Stitcher's Supplier (Borderless) [Secret Lair Drop Series] Collector −7: You may cast upSet: Secret Lair Drop Series Type: Creature Zombie Rarity: Rare Cost: {B} When Stitcher's Supplier enters the battlefield or dies, mill three cards. Heel! Wait, no fetch the whole leg! Stitcher Geralf