Spirit World

Biodata

Structure

• A complete world normally possesses a Material World alongside its first three Spirit World layers. These local layers can vary in form or fuse into a single structure, such as an Inner World, Underworld, or Netherworld. 395 605 643
• The first three layers depend on their associated world, while the Myriad Spirit World forms the shared foundation beneath all worlds. 643 726
• The Spirit World is regarded as the final destination of spirits, though souls may linger in the Material World because of obsession, resentment, or external influence. 64

Laws, Phenomena, and Dangers

Spirits and lingering souls

• Wandering Souls are lingering dead spirits that usually lack aggression and drift through the Material World or Spirit World. 64
• Long-lived or altered Wandering Souls may become Resentful Souls or Evil Spirits, which instinctively attack living beings. 64
• Evil Spirits above the second rank can influence the Spirit World itself and reshape local environments into blockades. 68
• Cursed Spirits can attack through higher Spirit World layers, bypassing defenses confined to the Material World or first layer. 53 105

Rule distortion

• The higher the layer, the less comprehensible its rules and appearances become. 70
• In the Dream Spirit World, reality's rules may fail entirely; its “dream” designation refers to this absurd distortion rather than a realm made solely of dreams. 203
• In some worlds, accumulated resentment, pain, desire, and malice can take form within the spiritual environment as curses, eventually threatening the Material World. 400

Spiritual tides and erosion

• Spirit Tides replenish a world's spirituality from the deeper Spirit World and enable supernatural systems to emerge or recover. 468
• Spirit World erosion can force higher layers into reality; Nia City's erosion reached the Mind World and threatened to advance further into the Dream Spirit World. 203
• The collision of divine powers destroyed Nia City and its Dream Spirit World, demonstrating that local Spirit World structures can be devastated. 436

Binding power

• Oaths made by high-ranking Spirit World creatures with the Spirit World as witness are highly binding. 384
• Spirit Sacrifice rituals can pierce a world's first three layers and reach the Myriad Spirit World and potentially deeper levels. 456

Access and Traversal

• Low-tier Mediums enter the first layer through Soul Projection, leaving their physical bodies behind. A vacant body may be possessed, while a spirit that remains away too long risks losing its body entirely. 66
• Spiritual items may accompany a projected spirit into the Spirit World, while ordinary physical objects generally cannot. 84
• Spirit World Travel allows a traveler to cross the Spirit World while carrying their physical body. 349
• High-ranking users of Spirit World Travel can bypass ordinary spatial restrictions, including the Mist Lock, and move between worlds. 360
• Unifying spirit and body greatly reduces the danger of bodily possession or becoming lost during Dream Spirit World exploration. 384
• Travel through the Myriad Spirit World remains hazardous because of turbulence, wormholes, hostile void creatures, and the immense distance between worlds. 395 423 466
• Spirit World Travel at higher levels permits passage through the Astral World and, later, entry into the True Spirit World. 555 707

Notable Inhabitants and Locations

• Vasheth — Blood-worshipping jellyfish-like entities in the Dream Spirit World; they are simultaneously individual organisms and a collective entity. 384
• Insect Carpet — A high-level Myriad Spirit World lifeform and servant of the Great Mother of Worms. 423
• Star Spirits — Void creatures capable of surviving in the Myriad Spirit World and traveling between its worlds. 605
• Silvenas — A peak sixth-tier Spirit World creature that inhabited cracks between reality and the Spirit World, created hidden spaces, and favored art galleries and exhibitions. 582
• River Styx — A death-aspected tributary associated with Lady Moon that flows through the Spirit World and draws spirit bodies into itself. 334 578
• Divine Kingdoms — Godly realms situated in the Astral World; the Abyss is the Divine Kingdom of demons. 555

Story Role / Major Arcs

• Sulu first recognizes the Spirit World as a reality overlapping the Material World, accessible through spiritual perception and Soul Projection. 47 68
• Kira Gales' research reveals its multilayered structure and proposes that deeper layers connect different worlds, Divine Kingdoms, and the Abyss. 70
• Sulu explores the first layer, later reaches the Mind World, and eventually enters the Dream Spirit World after improving Soul Projection. 84 105 203
• Exploration of the Myriad Spirit World reveals countless worlds and establishes it as the route used for interworld travel. 336 395
• The Astral World is identified as the fifth layer and the true location of divine kingdoms, correcting the belief that the Abyss lay within the Myriad Spirit World. 555
• The True Spirit World and Boundless reveal that the layered structure continues beyond gods and divine kingdoms, culminating in the authority to create worlds. 726 760
• Sulu's later creation of a separate Netherworld does not replace the Spirit World; it is a single-layer afterlife system established for reincarnation within a specific world. 799