Nullification Cannon

What? Not like it's a bug or a griffon or anything...

The Nullification Cannon renders energon useless. It was originally the Intergon Device, developed by Monitorus of the planet Tau-Ursa to make energon more potent, but then Galvatron got his hands on it...

Fiction

Transformers in 3-D

Soon after Monitorus completed his invention and presented it to the gathered Tau-Ursans, the planet was attacked by the Decepticons, who wanted the device for use in their eternal war against the Autobots. Galvatron easily took the creation and had his troops destroy the city before they left. He used the Intergon Device as part of the construction of his Nullification Cannon, which he immediately put to use in an attack on the Energon plant on Cybertron. With the planet's energon supplies destroyed, Galvatron believed that the Autobots would have no choice but to surrender.

Fortunately, the Autobots had found a beacon pointing the way to Metascan Alpha, which contained vast stores of energon. Optimus Prime invaded the derelict space destroyer that the Decepticons had been using for a base, intending to destroy the Nullification Cannon. After a brief fight with Galvatron, he prepared to blast the cannon, only to be beaten to it when Scorponok accidentally destroyed the device while trying to strike the Autobot leader. Galvatron was most displeased. The War Against the Destructons, Chapter 1 of 3