
You love cats so much that it gives you supernatural benefits linked to felines.
Ability Score Increase.
Your Charisma score increases by 2.
Spells.
You know the following spells, and can cast each a number of times equal to your proficiency bonus:
Animal Friendship, Animal Messenger, Beast Bond, Conjure Animals, Find Familiar, Speak with Animals
You can cast these spells only on cats.

now we need a Yuan-Ti cat edition
Isn't that called a tabaxi?
It's a +2 and some spellcasting. The cats only restriction would make this balanced if it was only a +1.