Wandering Wayfarer

Level Up {g} (Put a level up counter on this, activate
only as a sorcery)
LV 0-3 (2/1 with Vigilance) Whenever this
attacks or blocks for the first time each round
create a food token.
LV 4-6 (3/3 with Vigilance and Trample)
Whenever you sacrifice a food token put a +1/+1 counter on this. (Max 4)
LV 7+ (4/4 with Vigilance and Trample) When
this would leave the battlefield you may sacrifice
2 food tokens to return it to the battlefield.