The Great Horned Rat

The Great Horned Rat gets +1/+1 for each other
Rat on the battlefield.
Whenever a Rat deals damage to a player, exile
target card from that player's graveyard.
Whenever a card is exiled from a graveyard, if it
was an artifact card, create a Treasure token. If it
was a nonartifact creature card, create a Food
token. Otherwise, investigate.