
Racecourse Fury | Enchantment | Aura | Enchant land
Enchanted land has "{T}: Target creature gains haste until end of turn." | Sam Burley

Street Spasm | Instant | | Street Spasm deals X damage to target creature without flying you don't control.
Overload {X}{X}{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.") | Raymond Swanland

Vandalblast | Sorcery | | Destroy target artifact you don't control.
Overload {4}{R} (You may cast this spell for its overload cost. If you do, change its text by replacing all instances of "target" with "each.") | Seb McKinnon

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

Rakdos Cackler | Creature | Devil | Unleash (You may have this creature enter the battlefield with a +1/+1 counter on it. It can't block as long as it has a +1/+1 counter on it.) | Ryan Barger