Syr Alin, the Lion's Claw 
Legendary Creature — Human Knight
First strike (This creature deals combat damage before creatures without first strike.) Whenever Syr Alin attacks, other creatures you control get +1/+1 until end of turn.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL