Wind Shear 
Instant
Attacking creatures with flying get -2/-2 and lose flying until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
Attacking creatures with flying get -2/-2 and lose flying until end of turn.