Hungry Lynx is a rare Creature — Cat card from The List (PLST), collector number C17-31. Current market price: $6.55, TCGplayer market prices via Scryfall.
Cats you control have protection from Rats. (They can't be blocked, targeted, or dealt damage by Rats.) At the beginning of your end step, target opponent creates a 1/1 black Rat creature token with deathtouch. Whenever a Rat dies, put a +1/+1 counter on each Cat you control.