Ideon
From Hyfenwiki
The Ideon is a doomsday device owned by the Freikorps. Originally, the Ideon was built as a sort of deterrent, a weapon that could destroy the entire universe while said mech was inside that universe tended to be counterproductive. The Ideon's main weapon is something called the "Ideon Gun" after which the mech is named after. It has the ability to negate elctromagnetic forces within a universe, reducing all matter to subatomic particles incapable of forming larger shapes.
The Freikorps version is also fitted with Divide By Zero shielding, negating the gun's effect on anything protected by such a shield, including Freikorps ships and fighters. This means although the universe around them is destroyed, the mech and any other protected ships can shift to another universe unscathed.