Sandworms are the most dangerous of the native creatures on Abydosha.
Sandworms are animals similar in appearance to colossal terrestrial annelids and in other ways to the lamprey. They are cylindrical worm-like creatures with a fearsome array of crystalline teeth that are used primarily for rasping rocks and sand.
Sandworms grow to hundreds of meters in length, with specimens observed over 400 meters (1,312 ft) long and 40 meters (131 ft) in diameter, although These gigantic worms burrow deep in the ground and travel swiftly through most of the sand on Abydosha."
Sandworms are described as incredibly tough so atomics are the only explosive powerful enough to kill an entire worm, with conventional explosives being unfeasible.
They rely on vibrations through the ground to hunt and capture prey, vibrations such as footsteps. Using devices such as Thumpers, they can be distracted to allow safer passage through the desert.