Most Valuable Slayer 
Creature — Human Warrior
Whenever you attack, target attacking creature gets +1/+0 and gains first strike until end of turn.
Legality
standardLEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL
Creature — Human Warrior
Whenever you attack, target attacking creature gets +1/+0 and gains first strike until end of turn.