Giant fire beetle

Fire beetles are a large species of beetle found on Visa Isle.

Description
Fire beetles are nocturnal beasts with a blue and gold exoskeleton, black eyes, and blindsight with a radius of thirty feet. They possess a pair of glowing glands that emit light, for which they are named. These glands continue to emit light up to six days after death, making them prized as a light source by adventurers and miners. Fire beetles are normally found underground and in dark forests and jungles, such as those on Visa Isle, a pair of islands off the coast of Tal'Dorei's Bladeshimmer Shoreline.

History
By 812 PD, anyone who ventured to the jungles of Visa Isle and returned normally only saw the wild pigs, giant mantises, or the fire beetles, mistakenly believing the latter two to be the most dangerous inhabitants of the island.

Behind the scenes
In Dungeons & Dragons 5th Edition, fire beetles are officially called giant fire beetles. They were first mentioned in Critical Role in the 2017 sourcebook Critical Role: Tal'Dorei Campaign Setting in the "Visa Isle" section of Chapter 2: Gazetteer of Tal'Dorei simply as "fire beetles", possibly to avoid copyright infringement, as is the case with numerous other monsters. So far, they have yet to appear or be mentioned onstream.

Mechanics
Mechanically speaking, fire beetles are small-sized, unaligned beasts with a natural armor class of thirteen, an average of four hit points. and a walking speed of thirty feet. They have blindsight with a radius of thirty feet, a passive of eight, and a  of zero.

Fire beetles have an ability called "Illumination", in which they shed bright light in a ten-foot radius and dim light for another ten feet. As far as actions, they have "Bite", a melee weapon attack that deals slashing damage.