Whir of Invention [Mystery Booster] SM196 or when a Spell/Trap that

or when a Spell/Trap that is already face-up on the field activates its effect (Quick Effect): You can send this card from your hand or field to the GY

Exile any number of target spells

return it to the hand

Set: Beta Edition Type: Sorcery Rarity: Rare Cost: {2}{R} Each player discards their hand

Whir of Invention [Mystery Booster] SM196 or when a Spell/Trap thatSet: 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.