The Hands of Armageddon was a Chronian artifact that existed throughout time and space, in many alternate timelines. It was mentioned by Professor Paradox that it is a crosstime gateway.
Race Against Time TimelineOne of the interdimensional versions of the Hands of Armageddon arrived with Eon on an alternate Earth 200 years before the present, and was secured by the Plumbers, who regularly moved it around. Over the years, the Plumbers made many attempts to destroy the Hands, but it proved immune to all their methods. The failed attempts to destroy the Hands caused several famous disasters over history: the energy force from the first attempt created the Grand Canyon, one of the next attempts started the Great Chicago Fire, and Edward White's attempt to destroy the Hands in 1989 caused the Great Earthquake.
While the Hands of Armageddon was being held in Bellwood by the Plumbers, Eon finally located it, and intended to activate the Hands to unleash an extradimensional Chronian invasion upon the Earth, but Eon found that he was too old and weak now to successfully activate the Hands. Instead, Eon used the Omnitrix to turn Ben into a Chronian, and deactivated the Omnitrix's failsafe so that the Chronian DNA would transform Ben into a younger duplicate of Eon who would be strong enough to activate the Hands. The reborn version of Eon succeeded in activating the Hands of Armageddon, opening a time rift to allow the Chronian fleet through. But the Hands of Armageddon was disrupted and deactivated by Max, closing the time rift and sending the Chronians back to their dimension to perish. Hands of Armaggedon2 In Race Against Time
After the Hands was deactivated, it exploded when Wildmutt knocked Eon into it. This destroyed the RAT timeline's version of the Hands of Armageddon, although it was revealed in Ben 10,000 Returns that the other versions of the Hands throughout the timelines continued to exist.
Another version of the Hands of Armageddon was found in the prime timeline by Ben, Gwen and Kevin. Whenever activated, this version of the Hands would summon Eon's Servants from another dimension. They and a possible future Ben 10,000 took the Hands of Armageddon into the desert to be safely destroyed, but when the two Bens fused Way Big and Clockwork's rays in an attempt to destroy the Hands, they only succeeded in summoning Eon. The Hands of Armageddon was successfully destroyed by Jetray, defeating Eon and sending all the alternate Bens he'd absorbed back to their timelines. This time, the Hands of Armageddon was destroyed not just in one timeline but in all of them, ridding it from the multiverse for good changing all of space-time in the process.