Mr. Bumpaws, Scratchy Lord

Mr. Bumpaws enters the battlefield with 2 yarn counters on it. (Yarn counters must be represented with actual balls of yarn).
Whenever Mr. Bumpaws attacks, put a yarn counter on target creature you don't control. Then, when a cat inevitably knocks the yarn and cards off the table, if Mr. Bumpaws is the only card on the table, you win the game.