Take Heart 
Instant
Target creature gets +2/+2 until end of turn. You gain 1 life for each attacking creature you control.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Instant
Target creature gets +2/+2 until end of turn. You gain 1 life for each attacking creature you control.