Joshua, the Devourer

Affinity for Foods
{w}{b}{g}:target permanent becomes a food in addition to its other types
foods on the battlefield have "{t}, sacrifice this permanent: gain 3 life
You may activate abilities of foods on the battlefield
Whenever Joshua. the Devourer enters the battlefield or attacks, gain control of target food.
Joshua, the Devourer gets +x/+x until end of turn, where x is the number of foods sacrificed this turn.