Yesterday I posted a pic of a monster I am working up; today I have a revised image. It’s a little smaller and is more ‘dug in’ to the victim’s brain, using 1/2 of it’s eight tentacles to grasp the victim by the throat and sticking tentacles in the ears and mouth to ‘pull the strings’ on the person it is controlling… leaving 4 tentacles free to attack the next victim.
Edit: Better yet! Jon C. asked me if I had ever seen the old horror movie, “Fiend without a Face.” I have not, but check it out… brains crawling around like inch worms:

