Shade Lifecycle & Transformation

When a mortal dies, their spirit becomes a shade (Greek: skia, plural skiai) - a formless consciousness existing in the astral plane. In the ideal process, Charon ferries the shade across the River Styx to be processed into Tartarus, the underworld where souls await judgment and eventual passage to their final destination. This system prevents shades from lingering indefinitely in the astral plane.

However, this ideal rarely occurs. Since Gaia's death and the near-extinction of humanity, billions of shades remain unprocessed, creating a massive backlog. These unprocessed shades wander the astral plane, and over time, some undergo transformations that violate the natural order of death.

The Breach: Some shades find thin spots in reality: supernatural or historical significance, random weak points, or breaches deliberately caused by gods (like Athena's Tartarus breach). Shades that successfully breach into the physical plane undergo immediate mutation, becoming what are commonly called fiends (Greek scientific term: nekroi, "dead ones").

Why Mutation Occurs: Returning to the physical plane after death is fundamentally unnatural, violating the unwritten laws of the Kosmos that even gods must respect. This violation causes physical corruption.

Characteristics:

• Retain relatively humanoid form
• Become mindless beasts (zombie-like intelligence)
• Cannot return to the astral plane. The breach is one-way
• Dangerous but relatively straightforward to combat
• Path locked: cannot progress to other states

Athena's Tartarus Breach: The Luna breach connects directly to Tartarus's heart, allowing processed shades to escape. These might be tired of confinement, seeking escape, or simply curious shades who discovered the opening.

The Corruption: Some shades become maddened and vicious while remaining in the astral plane. This corruption typically stems from the mortal's death or life: unfinished quests, unrequited love, burning desire for revenge, traumatic death, or madness induced by the void itself. The exact causes remain mysterious. These are commonly called reavers or shade-eaters (Greek scientific term: skiaophages, "shade-eaters").

Unnatural Behavior: These corrupted shades begin attacking and consuming other shades. This act is as unnatural as breaching to the physical plane. Consuming shades causes mutation in the astral plane, though they remain spiritual entities rather than physical ones.

Characteristics:

• Tormented, having lost all semblance of their former lives
• Self-isolating from peaceful shades
• Dangerous to astral projection users and other shades
• Can still breach to physical plane (becoming chimeras/terata)
• Undergo mutation due to consuming other shades

Double Mutation: When a corrupted shade (reaver/skiaophage) breaches into the physical plane, it undergoes a second mutation on top of its existing astral corruption. The double mutation from consuming shades AND from breaching produces monstrous, animalistic forms reminiscent of creatures from ancient Greek mythology. These are commonly called chimeras (Greek scientific term: terata, "monsters").

Characteristics:

• Animalistic and monstrous appearance (like chimeras, hydras, harpies, and other mythological beasts)
• Larger and significantly harder to kill than fiends
• Cannot return to astral plane. The breach is one-way
• While unique individuals, they follow recognizable monstrous patterns
• Path locked: cannot progress further
• Sometimes brought through by behemoths (kosmoterata)

The Threshold: When a corrupted shade consumes enough spirits and accumulates sufficient spiritual power, it grows large enough to exist simultaneously in both the physical and astral planes. This is the most dangerous transformation as it creates entities that breach the barrier between realms simply through their presence. These are commonly called behemoths or celestial beasts (Greek scientific term: kosmoterata, "cosmic monsters").

Characteristics:

• Enormous and utterly unique, with truly alien appearances
• Exist simultaneously in both physical and astral planes
• Must be killed in the physical plane to die
• In the astral plane, appear as massive, opaque presences
• Attract other reavers (skiaophages) to their astral presence
• Can gravitationally pull chimeras (terata) through to physical plane (some may do this consciously)
• Getting too close to their astral presence can pull shades or chimeras into the physical plane
• Each has unique abilities and weaknesses

Hunting Dangers:

• Physical combat is difficult due to size and unique abilities
• Soul sailing near them is extremely dangerous
• Their astral presence can kill shades maneuvering ships
• Can kill or trap astral projection users
• May attract chimera followers during combat

Origin Debate: Behemoths come from two sources:

• Solar System Origin: Human shades from this system that became behemoths (kosmoterata). Some drift beyond the Oort Cloud.
• Alien Origin: Shades from alien civilizations beyond the Oort Cloud that have drifted into the solar system from the depths of the astral sea.

Experts attempt to determine origin by analyzing the creature's appearance. The more alien and incomprehensible the form, the more likely it originated beyond the Oort Cloud from non-human civilizations. Beasts with somewhat less alien features might be from the solar system. For example, they might originate from ancient human extinction events (like the Black Plague) that drifted outward over millennia. However, this method is debated and imperfect, making origin determination an ongoing scholarly argument.