In 957 GUE, the demon Jeearr's plot for conquering the world involved
manufacturing an army of millions of light-resistant grues beneath
Egreth Castle using infernal machines conveniently provided by the
Frobozz Magic Mutated Grue Breeder Company. Luckily for mankind, these
mutated grues were never released into the world at large. These
mutated grues were not bothered by light in the least, not even by
powerful FROTZed spells.