Piston-Fist Cyclops 
Creature — Cyclops
Defender As long as you've cast an instant or sorcery spell this turn, this creature can attack as though it didn't have defender.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL