Pickle Rick, Reckless Inventor

Whenever Pickle Rick or another Rat you control enters, create a 1/1 black snail creature token if you don't control a Snail. Otherwise, put a +1/+1 counter on a Snail you control.
{u}{b}{r}, Sacrifice a Snail: Pickle Rick deals damage equal to the sacraficed creature's power to each opponent. Then draw cards equal to the sacraficed creature's power.