Less than an inch long, the rotgrub lies waiting in food. Once
ingested, the rotgrub heads straight for its victim's brain and begins
feeding. Rotgrub death is excruciatingly painful and lasts years before
a welcome demise. They are totally impervious to all forms of magic,
and, even worse, smell like very old cheese. A common house rotgrub is
gray and red and gray and purple and red. Rotgrub hearts are coveted by
witches for use in various conjurations.