Shadow Void (Kageseishou)

The Shadow Void was largely theorised upon over the larger course of Seretai History and has been observed and studied in its theory by many past Captains of the 12th Division Research and Development.

The theory is understood and sound in its neccessity to exist, but had until two thoasand years ago been inconclusive in its evidence.

Acting as a spiritual barrier between worlds; the Shadow Void is a dimension between dimensions, generally thought to surround and encase the Dangai Precepice, which links together all worlds. The Shadow Void is thin and vast at the same time, occupying the very space and breadth of a Senkaimon and Garganta when they tear open, and yet vast enough to be considered its own universe.

As science dictates that things have a polar opposite, the same is with Spiritons. As each world is vastly held together by spiritual energy, even the living world, it would, where it not for the Shadow void, be easy for the dimentions to bleed into each other. Theory dictated that the Shadow Void had to be formed by a substance that repel and control normal Spiritons.

Two thoasand years ago, the previous 13th Division Taicho, Izzaria Samiru, was working within the 12th lab (under the eye of the then Vice-Captain of 12th, Aroki Samiru, her husband) studying her own unique ability, having the power to tear open portals that led into the Shadow Void. She found a mass of energy that encompassed, contained and filled the Shadow Void. She dubbed this energy, Dark Spiritons.

Dark Spiritons function with an alternate electrical charge to standard spiritons, their gravitational flow is different and instead of emmitting light,. they absorb it, giving them the appearence of blackness and shadow.

Their gravitational force and focus within this void were the sole reason the dimensions never bled together, the Shadow Void is small and difficult to find, but neccisary to the survival of all dimensions.