Greenwheel Liberator 
Creature — Elf Warrior
Revolt — This creature enters with two +1/+1 counters on it if a permanent left the battlefield under your control this turn.
Legality
standardNOT LEGALpioneerLEGALmodernLEGALlegacyLEGALvintageLEGALcommanderLEGAL