Skulduggery 
Instant
Until end of turn, target creature you control gets +1/+1 and target creature an opponent controls gets -1/-1.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
Until end of turn, target creature you control gets +1/+1 and target creature an opponent controls gets -1/-1.