The Damocles

The damocles is a great weapon located under the Akkadian cathedral. It utilises the power of the imaginary plain to generate a massive wave of anti-life that can decimate anything the user demands. The weapon has a limited range but can be extended using the intrinsic link between any living creature and the imaginary plain. A creature like Ludoshiel who is born of the imaginary plain could do this by himself. The Order has begun to understand this but is not yet ready to implement it.
The weapon is a housing for a great creature born of the imaginary plain. A creature like it cannot usually exist within the physical world. However due to the melding boundaries of the plains and the mental strength of Artoria it has been chained. However it cannot remain on this plain if it's chains are cut. Said chains are created by the pockets of the imaginary birthed from the peacekeepers twisted minds.