A Megadeath-Class Gear known as the Hydra attack and destroyed London, England. Capable of destroying an entire metropolis of one million in under an hour, the Sacred Order were unable to defeat it as it rampaged for a day and a night. Even when Kliff Undersn arrived, he fought the beast single-handedly for seven days and nights and only successfully managed to sever three of its five heads and four of its sword-like limbs. Unable to spare more time on finishing off the Gear, the Order wrapped it in thirteen chains and placed boulders on the remaining two heads and sealed it away as no-man's-land. Though despite the seal, a village would later settle on top of where the Gear lies, still sleeping.