|“||On the Great Chain, the Heart of the Labyrinth hangs in balance between Hades and Olympus. If one side loses its grasp, the power in the Labyrinth will rise or fall accordingly, the balance forever shifted. And as always, man will be caught in the wake.||”|
God of War IIIEdit
The chain connects the Underworld and Mount Olympus to each other, creating (as the name suggests) a balance between both worlds. Destroying the chain would mean cataclysmic changes for both worlds, possibly disrupting their climates, if not their future existence. The chain is held by the Judges of the Underworld who are tasked with holding it in place. The chain was lifted partially when Kratos subjected in the Trials of Erebus, exposing the Onyx the locks them in Hades' realm.
After having freed Pandora from the Labyrinth, Kratos descended once again into the Underworld. Using the Nemean Cestus, Kratos destroyed all three Judges, which caused them to release their grasp upon the chain. After having defeated the judges, Kratos used the Cestus to ultimately shatter the chain, which raised the Labyrinth and undid the balance of power within Olympus.