- "Wisely did Ibn Schacabac say, that happy is the tomb where no wizard hath lain, and happy the town at night whose wizards are all ashes. For it is of old rumour that the soul of the devil-bought hastes not from his charnel clay, but fats and instructs the very worm that gnaws; till out of corruption horrid life springs, and the dull scavengers of earth wax crafty to vex it and swell monstrous to plague it. Great holes secretly are digged where earth's pores ought to suffice, and things have learnt to walk that ought to crawl."
- ― (H.P. Lovecraft, The Festival)
User with this ability either is or can mimic/transform into worms, a collective term descripting many different distantly-related animals that typically have a long cylindrical tube-like body and no legs. These include annelids (earthworms), nematodes (roundworms), platyhelminthes (flatworms), marine nemertean worms (bootlace worms), marine Chaetognatha (arrow worms) and priapulid worms.
See Also: The Worm That Walks.