Stealthy. You have proficiency in slight of hand and stealth.

Slime form. You can willingly transform into an actual slime, not shaped, you lose control of your shape and turn into a puddle, you can move around like this, and automatically transform when sleeping and attempting to swim, this makes you act as a liquid, you ALSO transform into this when you hit the ground after falling for a while, splat!

Shapeshift. Every long rest, you can shift a little if you want, change your size (but stay size small), change your color, change your general shape a little bit, legs, tail, just mess with stuff, but there is one rule: stay within small size category and stay in the shape of a cat.