The Grue is a sinister, lurking presence in the dark places of the earth with insatiable appetite. Its favorite diet is either adventurers or enchanters. Its insatible apitite is only tempered by its fear of light.
They are famous for their horrible fear of light: No grues have ever been seen by the light of day, and only a few have been observed in their underground lairs. Of those who have seen grues, few ever survived to tell the tale. Grues have sharp claws and fangs, and an uncontrollable tendency to slaver and gurgle. They are certainly the most evil-tempered of all creatures; to say they are touchy is a dangerous understatement. "Sour as a grue" is a common expression, even among themselves.