Master, please get me out of here. The chanting. The rituals. They are all mad, and I am starting to believe in their madness. A worm is dead. This is what I know.
Mysa Tarill stands above a convenient source of geothermal energy. It’s rocky exterior was judged safe from worm incursion. Under Harkonnen rule, a power plant was built here to charge great cells. However, the perceived safety was false. A massive sandworm shattered the rock barriers, laying the operation to waste. The process also killed the worm, as it was exposed to the powerful electric currents of the assembled power cells (see paper by Liet Kynes regarding worm death).
I believe low-level power generated by the still semi-functional equipment within the plant has somehow preserved the worm carcass. The intact worm has become a holy relic of the Maas Kharet cult. They are convinced the attack of the worm was ordained by God and see its preservation as a miracle. Their fervor grows.
Please, Master, release me from this assignment!