Bonesaw- MR Dura

An air vent at the very top floor was punched free of the wall.  My bugs could sense the long claws, the conical nose.  They started chewing on her, devouring and biting, but her skin was tough, as though most of it was scar tissue.  I could feel the hot air as she rapidly inhaled and exhaled.
...

I could hear another Murder Rat on the stairs below us.  She let her claw drag on the wall, and the metal on concrete made a sound like five nails on a chalkboard.   Loud, slowly increasing in volume as she approached us.

I set my bugs on her.  She persisted, simply enduring what they were doing to her.  I tried to go for the tiny eyes that were nearly buried behind her altered face and brow, but she shut them, relying on touch and smell to move.  I started to pack bugs around her nose and mouth, and found that slowed her just a fraction.

- Worm, Sting 26.3