Exemplar of Strength 
Creature — Human Warrior
When this creature enters, put three -1/-1 counters on target creature you control. Whenever this creature attacks, remove a -1/-1 counter from it. If you do, you gain 1 life.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL