Magnetic disruptor
From Transformers Wiki
Magnetic Disruptors are Decepticon war machines designed to manipulate magnetic fields. Two operating in unison can deactivate the geomagnetic field of a planet.
Fiction
Cyberverse Cartoon
After Slipstream's squadron had consistently failed to kill two Autobots or find the AllSpark, Shockwave came to Earth in a ship that spilt into two smaller craft, each with a disruptor, intending to use them to sterilize all organic life on Earth and quickly locate the AllSpark on the deserted world. The scientist took Acid Storm and Thrust with him to the South Pole, while Shadow Striker took the remaining seekers to the North Pole. Unfortunately for the Decepticons, Teletraan-X had picked up the ships with the orbital scanner in Grimlock's base, and the Autobots headed to the North Pole to save the planet. Windblade lured out Slipstream and Nova Storm, while a dancing Bumblebee attracted Shadow Striker, leaving Thundercracker alone to operate the disruptor. Grimlock and Teletraan-X managed to sneak aboard, and after knocking out the Seeker and smashing some of Shockwave's drones, the two were able to destroy Shadow Striker's ship, saving Earth. The Extinction Event
Shockwave later used the remaining disruptor to ignite Mount St. Hilary, intending for the eruption to destroy the Ark. Though the disruptor re-activated the volcano, Teletraan-X had managed to raise the Ark's shields in time. Eruption