Boneface

"Boneface" is a general descriptor given to an unidentified form of humanoid monster, or condition affecting humans which causes them to morph into a monstrous creature.
These creatures can appear human, and then transform into the creature. When they are transformed, their faces have boney protrusions, and they shimmer with green and purple coloration.

by Midjourney

They are no longer able to communicate, and become belligerent.

Show spoiler

The "creatures" were discovered to be pollen-induced hallucinations which caused humans not under the thrall of the invasive plant entity to appear hostile to those under its power.

Average Height

5 foot 10 inches

Average Weight

175 lbs.