A colossal serpent that lives deep in the earth. Although no one has ever seen the entire body of one, they're said to grow upwards of twenty miles long. The creatures live their lives without ever moving a fraction of an inch, using high frequency vibrations to create fragile layers of earth and sand in thousands of places on the surface so the might feed on those unfortunate enough to stumble into on of their traps. THese layers move relentlessly downward, becoming a kind of quicksand. On their way to the Zemeckis rendezvous point, D and Pluto VIII encounter one but are saved by blasts from the Mobile Town's Prometheus Cannon.