ochre jelly

Yellow-brown plasma in a dense cellular wall, covered in fine cilia and probing psuedopods. Splits when struck by blades into copies of itself, but burns readily. Dissolves only flesh and living tissue, leaving bone and other organic material like wood intact, in addition to all inorganic substances.

Ahmoset Nez sold a powerful ochre jelly to Hendrid Pratchett to use as a mindless disposal device for his murders.