Bone thief are yellow giant frogs except they don’t jump. They

 also described as massive potato shaped beings with bumpy, sickly yellow skin impenetrable to any weapon except nuclear artefacts like a missile.

Anyways, the have a big mouth with no more facial features except, inside their mouth lies it’s eyes.

The Bone thief’s eyes has a power to stare a victim down and desintegrate the victim’s bones with just a stare.

Their stationary predators with their only method of hunting is to wait for a prey to get close to it and stare it down

for 3 seconds to eliminate its bones.

Then, the Bone thief uses one of his “frog legs” to grab the victim and eat it as shown in the photo above by Backroomsfoundation. However, if the victim escapes before 3 seconds of the bone thief stare

the victim will survive.

Habitat: slideroom (a isolated room in level 0 with acuatic slides on a wall and you have to choose which is the right one

to go to a certain level, sometimes even back to reality) Level 4 and 1