Despite how long the creature type has been around, there is actually a rather small number of Rat cards, with only about 100 Rats in all of Magic
While you can build around it, I doubt that particular deck is likely to be one of the best, and the drawback gets a lot worse once people side in instant speed enchantment removal to really punish you
Paralysis ends after this period of time and it does not require any coin to be tossed to remove the Paralysis
// Ajani, Nacatl Avenger Legendary Planeswalker Ajani 3 +2: Put a +1/+1 counter on each Cat you control
The rare holo card in this deck is Dark Typhlosion, with other Pokemon like Dark Magcargo, Dark Haunter, and Girafarig also making an appearance
And insert them into a hard case or a Toploader for added protection