Heightened Reflexes 
Instant
Target creature gets +1/+0 until end of turn. Put a first strike counter on it.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
Target creature gets +1/+0 until end of turn. Put a first strike counter on it.