When this creature enters, it deals X damage to target creature or planeswalker an opponent controls, where X is the number of creature cards in your graveyard.
You know you've ventured too deep when the rats stop running and hold their ground.
Pack Rat's power and toughness are each equal to the number of Rats you control. {2}{B}, Discard a card: Create a token that's a copy of this creature.
Rats carry disease—it's why they get such sick pulls.
This creature can't block. When this creature dies, create X 1/1 black Rat creature tokens with "This token can't block," where X is the amount of damage dealt to it this turn.
Clawing for scraps and driven mad by hunger, the individual rats became a writhing mass.