It depends if they can transmute biological matter and if they can do it from a distance without touching them. if you answer all 3 as yes, then yes it's possible.

I’m pretty sure they can, but it would be pretty disturbing to watch and it would be definitely horrifying for the person who’s being tortured that way!

I think it's more Biological Manipulation than Matter Transmutation.

Nah, it was reality warping through chaos magic.