The void blaster is a variant of demon that lives in the darkest caverns in the underworld, dark and damp, and mostly made of dark glossy obsidian, where geysers of white flame scattered sparsely are the only source of light.
These cyclopean demon's eyes can lock on to targets, and have an advantage against seeing through illusion magic, they form the same fire energy as the white flames of their biome in their gut and blast them out of their mouths.
More often than not, void dwellers are unwelcoming of outsiders.