
Blustersquall | Instant | | Tap target creature you don't control.
Overload {3}{U} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.") | Willian Murai

Dispel | Instant | | Counter target instant spell. | Chase Stone

Downsize | Instant | | Target creature you don't control gets -4/-0 until end of turn.
Overload {2}{U} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.") | Ryan Pancoast

Faerie Impostor | Creature | Faerie Rogue | Flying
When Faerie Impostor enters the battlefield, sacrifice it unless you return another creature you control to its owner's hand. | Johann Bodin

Mizzium Skin | Instant | | Target creature you control gets +0/+1 and gains hexproof until end of turn.
Overload {1}{U} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.") | Scott Chou

Syncopate | Instant | | Counter target spell unless its controller pays {X}. If that spell is countered this way, exile it instead of putting it into its owner's graveyard. | Clint Cearley

Judge's Familiar | Creature | Bird | Flying
Sacrifice Judge's Familiar: Counter target instant or sorcery spell unless its controller pays {1}. | Jack Wang

Blistercoil Weird | Creature | Weird | Whenever you cast an instant or sorcery spell, Blistercoil Weird gets +1/+1 until end of turn. Untap it. | Dan Scott

Nivmagus Elemental | Creature | Elemental | Exile an instant or sorcery spell you control: Put two +1/+1 counters on Nivmagus Elemental. (That spell won't resolve.) | Mike Bierek