As its name might suggest, the Worm that Gnaws in the Night was an enormous, worm-like creature. It was once summoned to the planet of Shaggai by the alien Shan for reasons unknown over eight hundred years ago. Once the entity had been summoned, the Shan were unable to control it, or even send it back from whence it came, and the beast had been slowly consuming their world from the inside out; before it could finish its task, however, the planet was destroyed by the crimson radiation emitted by the Outer God Ghroth. Whether the Worm suffered the same fate as Shaggai remains a mystery.
- Shaggai (1971), by Lin Carter.