Black Market [Mercadian Masques] Cat Beast destroy all non-Wall creatures that

destroy all non-Wall creatures that player controls that didn't attack this turn

but my host would casually push it down before I could make out what it was

that spell can't be countered

Set: Legends Type: Legendary Creature — Human Artificer Rarity: Rare Cost: {W}{W}{U}{U} Banding (Any creatures with banding

They're still lands

Black Market [Mercadian Masques] Cat Beast destroy all non-Wall creatures thatSet: Mercadian Masques Type: Enchantment Rarity: Rare Cost: {3}{B}{B} Whenever a creature dies, put a charge counter on Black Market. At the beginning of your precombat main phase, add {B} for each charge counter on Black Market.