Starving Swarm

At the start of your upkeep, sacrifice a Food
token. If you do, add a +1/+1 counter on
Starving Swarm, otherwise Starving Swarm
fights a creature with the lowest toughness on the battlefield. If multiple creatures share the same toughness, you may choose which one it fights. If
there are no other creatures, sacrifice Starving
Swarm.