Steal Strength 
Instant
Target creature gets +1/+1 until end of turn. Another target creature gets -1/-1 until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
Target creature gets +1/+1 until end of turn. Another target creature gets -1/-1 until end of turn.