Krinn, Ratfolk Chancellor

Deathtouch, Skulk, Haste
Other rats you control have Bloodthirst 1 (If an opponent was dealt damage this turn, this
creature enters the battlefield with a +1/+1
counter on it.)
When a Rat you control deals damage to an
opponent, Create X 1/1 black rat creature tokens,
where X is the number of rats you control.