S-Bomb

Sludge Bombs are explosive devices that derive their destructive force from Sludge detonation. Sludge Bombs have been used several times by humanity against the invaders during the Human-Vannai War due to their tremendous potency, comparable to tactical nuclear warheads. They are considered weapons of mass destruction.
The first ever use of a Sludge Bomb was during Operation Falling Down, in which a car-sized vat of Sludge salvaged from a number of ruined Suits and Vannai constructs was detonated with enough force to destroy everything in a 45-mile radius. Several years later, a more refined and properly weaponized device was used to destroy the Gigafort Fortress of Giants during Operation Dead Man's Fist. These bombs use the supercooling method fist discovered by Pandora for safe transportation. Upon deployment, rapid changes in temperature or even abrupt changes in motion are enough to cause detonation. Another S-bomb was used against the Gigafort Long Shadow during the China War, this one developed independently by the Huang Kingdom.
Although not the result of a "bomb" per se, the largest intentional explosion in human history was caused by an ACC pilot going by the callsign "Cultist" during Operation Unity, where an entire STADIUM full of Sludge, along with the Grey Material, was triggered to explode. The effects of this massive detonation, visible and felt across the entire planet, are still being studied.
The term "Sluke" has also been used to refer to S-bombs (a portmanteau of "Sludge" and "nuke"), while the Japanese Empire categorizes any Sludge-based explosive as a Sludge Enhanced Explosive Device (SEED).
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