It's not just animals that endanger blindheims. Underground peoples find the creatures useful and attempt to capture them for specialized purposes. Duergars use them as "raid frogs," placing heavy hoods over blindheims' heads and revealing them suddenly during raids to blind their foes. They sometimes send the creatures along with their slaves that lack darkvision into the mines as a source of light. Drow use them for some of these same purposes, and some nobles have been known to treat the creatures as mere lanterns, having them hoisted to the ceilings of their halls. Neither duergars nor drow take good care of the captive creatures, so blindheims rarely last long in captivity.