Instead of dealing 30 damage per Pokmon, the attack now deals 50 damage for every Drifloon and Drifblim the player has on the board
Lands, creatures, artifacts, planeswalkers, even enchantments
While there are plenty of normal cats in Magic, there are also quite a few cat hybrids like cat dragons or elemental cats
Not quite the traditional Fling effect (here your opponent can remove the sacrificed creature in response to casting the spell), but it has upsides in that the creature itself deals damage to the target, so deathtouch or lifelink will work (as will abilities that trigger when the creature deals the damage)
In my opinion it's fun to play and almost doesn't feel like a Goat Format deck
Malleable Impostor can become a copy of an opponents creature at instant speed