Power to use the abilities of worms. Variation of Animal Imitation and Animal Morphing.
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.
The Flukeman (The X-Files)
Earthworm Jim (Earthworm Jim)
Kraathatrogon (Teenage Mutant Ninja Turtles 2012 TV series)
Tatzlwurm (My Little Pony: Friendship Is Magic)
The Worm That Walks (Advanced Dungeon&Dragons/Pathfinder)
Sandworm (Beetlejuice: the Animated Series)
Sandworm (Monster Girl Encyclopedia)
Alaskan Bullworm (Spongebob Squarepants)
Worm (Dynomutt, Dog Wonder)