Disallow | Instant | | Counter target spell, activated ability, or triggered ability. (Mana abilities can't be targeted.) | Min Yum
Illusionist's Stratagem | Instant | | Exile up to two target creatures you control, then return those cards to the battlefield under their owner's control.
Draw a card. | Svetlin Velinov
Leave in the Dust | Instant | | Return target nonland permanent to its owner's hand.
Draw a card. | Vincent Proce
Metallic Rebuke | Instant | | Improvise (Your artifacts can help cast this spell. Each artifact you tap after you're done activating mana abilities pays for {1}.)
Counter target spell unless its controller pays {3}. | Eric Deschamps
Negate | Instant | | Counter target noncreature spell. | Zack Stella
Take into Custody | Instant | | Tap target creature. It doesn't untap during its controller's next untap step. | David Palumbo
Whir of Invention | Instant | | 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. | Christine Choi