Stampede 
Instant
Attacking creatures get +1/+0 and gain trample until end of turn.
Legality
standardNOT LEGALpioneerNOT LEGALmodernNOT LEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
Attacking creatures get +1/+0 and gain trample until end of turn.