Whir of Invention [Mystery Booster] 218 that monster's current ATK is

that monster's current ATK is halved

Set: Legends Type: Creature — Insect Rarity: Rare Cost: {1}{G}{G} Flying

Set: Neo Discovery Unlimited Type: Fighting Rarity: Holo Rare Retreat cost: Colorless

Set: Portal Three Kingdoms Type: Creature — Human Barbarian Soldier Rarity: Uncommon Cost: {4}{R} Horsemanship (This creature can't be blocked except by creatures with horsemanship

Whir of Invention [Mystery Booster] 218 that monster's current ATK isSet: Mystery Booster Type: Instant Rarity: Rare Cost: {X}{U}{U}{U} Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.) Search your library for an artifact card with mana value X or less, put it onto the battlefield, then shuffle.