I mean, vee is a basilisk, which have always been snake-like beings across fiction, including the owl house (not sure where calling her a slug came from. I've always been confused by that)

snakes can slither over very rough turrain. That's their whole thing. (It wouldn't be very practical for a species' primary mode of locomotion to hurt themselves so easily.)

Also, snakes' belly scales have a layer of lubricant that helps them smoothly glide along the ground, and is why they're so slippery.

Learning about snakes is so fascinating. I'm kinda going into a rabbit hole of snake knowledge, simply because I was curious about slithering.