At the very edge of Observer influence are the Borderlands where Aether Pressure is lowest, and reality begins to break down. Chaos begins to seep through the literal cracks left in reality which allow the emergence of Aberration, Kin, and Fae.
The Borderlands are governed only by the Marshals who are the vanguard against the various threats which manifest here. This also makes it open for various illicit activities.
The Marshals are absolute authority on the Borderlands with international jurisdiction. The Marshals patrol the Borderlands as first responders to coming threats. However, they exist merely for containment; they are not trained nor interest in battles of attrition. Hunters will be called into for this express purpose; to clear existential threats.
Hunter relations with the Marshals is hardly friendly competition, or friendly for that matter, but they are comrades in arms, and each necessary.
Located near the center of any Borderlands is located these compact, defensible structures which accommodate the Marshals. They are equipped with barracks, armory, medical facilities, workshops, and probably most importantly, Special Facilities for Plastid Transposition.
Hunters, and in fact anyone, may be given limited access to these Forts either for safety or recuperation. A Fort’s Facilities are Restricted, and Access requires permission from the Marshals on base.
Depth refers to the distance someone is from an Observer, and thus Aether Pressure within the area. In reality, the Aether can be thought to radiates outward from the “cracks” in the world. Thus, deeper Depths have a maximum altitude they may achieve. Think of the Observers and the cracks as the most extreme opposing ends of a field of force.
The deepest and most turbulent layer of the Borderlands;
Great torrential ravines which pore out from the world.
Depth 5 averages 70 Kilometers in width, but may fluctuate up to 10km erratically.
Anything that falls into a Ravine is Annihilated and/or suffers infinite Vacuous Damage.
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The fractured outer layer of the Borderlands;
Reality is warped and strange in this place.
Depth 4 will average 1400 Kilometers in width.
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The largest and most stable layer.
Depth 3 covers most of the Hollow’s oceans, the air and space between the World’s Shell and the Reality Engine at it’s heart, and the majority of the inland Nations.
This layer engulfs each Observatory;
The Field Density is strong enough to feel on your mind.
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The Observer’s Chamber;
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During the rise of DivSov, these near indestructible piles were built across the Borderlands. Resonating with the Observatory Spires, their signal could contain the more powerful Fae to the Borderlands.
While Pylons can contain Giants at Depth 4, their Kin and Aberration remain unaffected. The damage caused by Fae incursion could be mitigated, but it is only a topical solution; Giants need to leave the Borderlands to prove hazardous.