Mizzix's Mastery [Mystery Booster] 74b you can select 1 monster

you can select 1 monster you control

Reverse Type: Legendary Enchantment Whenever an opponent casts their first spell each turn

Unbounded hopes

Set: Sword & Shield: Black Star Promos Type: Grass Rarity: Promo Retreat cost: Colorless

Mizzix's Mastery [Mystery Booster] 74b you can select 1 monsterSet: Mystery Booster Type: Sorcery Rarity: Rare Cost: {3}{R} Exile target card that's an instant or sorcery from your graveyard. For each card exiled this way, copy it, and you may cast the copy without paying its mana cost. Exile Mizzix's Mastery. Overload {5}{R}{R}{R} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.")