MasterHand

“Centuries ago, the greatest Titan artisans and the finest Cyber City engineers joined forces, and a colossal masterpiece was born. It could protect their civilizations while also satisfying their thirst for even greater power, the power core contained star energy. To test the weapon, they relocated to another planet. They built a city-scale test site, and it was activated there for the first time. It took only 0.4 seconds to achive the city-scale destruction they wanted. The weapon's power went for beyond that and shattered the planet itself into pieces. The faces of those who were admiring its power changed in an instant. As the test site was completely annihilated, Master Hand having lost control began destroying everything within reach in the weightless void, and when there was nothing left to destroy, it paused for a moment. To completely neutralize it, the Titans' "Spear of the World" and Cyber City's "Shield of the Sky" were deployed. There was a moment when a massive flash of light shone down across the night sky. Afterward, Master Hand was damaged as parts of it were vaporized, but each section was dismantled separately and sealed away.”— Sol's RNG (as quoted on the wiki)