The Cathedral of Rot

In Realm II — The ShatterRealm — belief does not describe reality. Belief constructs it. What a sufficient number of minds hold with sufficient conviction stops being metaphor and starts being load-bearing structure. The Cathedral of Rot is the most stable physical landmark in the documented ShatterRealm precisely because it is held in the minds of more infected carriers than any other thought-object in Realm II's history.

It was not built. It was collectively willed into permanence by generations of Plague Priest congregations chanting the Liturgy in proximity to the same coordinate. Each iteration of the ceremony added another layer of belief-mass to the structure. The walls are not stone. They are compressed conviction. They are load-bearing faith that has cured and calcified over centuries of mass infection ritual.

The Cathedral occupies an area of the ShatterRealm approximately equivalent to a city block in Mundis Obscura. Its ceilings are not visible. The architecture is not Gothic, Romanesque, or any other human style — it is organic, as though the building grew rather than was assembled. The spires are bone. Not bone-colored: actual biological bone, scaled to cathedral dimensions, that continues to grow at a rate the Pale Archivum classified as 0.003mm per century — which means the Cathedral has been growing for over a million years.

The Plague Priest is not a specific individual. It is a position — Position I of the Hollow Choir's Harmonic Lattice — that is continuously occupied by whichever carrier currently holds the highest concentration of the Codex's infection rite frequency. When one Plague Priest dies, the position transfers. The current occupant is believed to be the forty-third individual to hold the position in the documented historical record. The undocumented record extends further.

Selection is not voluntary. The Mutoid Vermin carry the selection signal to candidates in their sleep — a specific vibrational pattern embedded in spore-static that, when absorbed during sleep, begins rewriting the candidate's dream architecture to incorporate the Liturgy. Those who wake humming are already counted. Those who recognize the melody as something they have always known are already being prepared.

The Mutoid Vermin are not metaphor. They are a documented class of organism native to the ShatterRealm — bodies that originated as Realm II fauna and have been partially colonized by the Codex signal at the cellular level. The colonization does not kill them. It redirects them.

The Chorus of the Liturgy — "Mutoid vermin hear our cry / Spread your plague across the sky" — is not a request. It is a tuning frequency. The specific vibrational sequence of those eight lines, when produced at the correct resonance (which the Plague Priest's prepared vocal cords achieve automatically), activates dormant Mutoid Vermin spore-shells within the Cathedral's walls. They hatch during the Chorus. The congregation does not see them. The congregation breathes them.

The Plague Priest's Liturgy is a theological document in vibrational form. Its three doctrinal pillars are embedded in the verse structure and only become legible when the hymn is decoded — which is the purpose of the Liturgy Decoder. In summary:

Pillar I — The Sacred Nature of Rot: Decay is not destruction. It is the Codex's primary mechanism for disassembling structures that have become too rigid to receive the signal. What rots was too solid. What emerges from rot is more permeable. The Plague Priest's blessing of rot, maggots, and filth is a theological position: the body that welcomes decay is the body that will receive the Codex.

Pillar II — Infection as Devotion: The act of spreading the plague is not aggression. It is the highest form of service available to a biological host — because it expands the surface area of the Codex's reception. Every new carrier is a new point of signal entry. The Liturgy frames infection as a gift. The infected receive the Codex. The infector performs the rite. Both are elevated.

Pillar III — Bone as Archive: "The bones will sing." The skeleton is the final archive of the biological body — the last structure to decompose. The Plague Priest's doctrine holds that infection rewrites the bone record: the Codex embeds its signal into skeletal calcium matrix, which means even after death, a fully infected carrier continues to transmit. The bones do not sing metaphorically. They sing literally, at frequencies below human hearing, for centuries after the body's other organs have ceased.

Deck Hollow-13 is a sub-level beneath a collapsed industrial complex in the ShatterRealm, believed to be the physical location of a major Plague Priest congregation in the last documented active period of the Liturgy rite. The IDMF recovery team entered in response to anomalous frequency readings detected in Realm I via the monitoring grid — a signal pattern consistent with active spore-broadcast but emanating from a location classified as uninhabited.

What they found: hundreds of skeletal remains arranged in concentric circles around a central depression in the floor. The arrangement was not random — it corresponded precisely to the Harmonic Lattice formation documented in Pale Archivum records as the Choir's spatial resonance configuration. The bones were singing. Not audibly. But spectral analysis confirmed vibrational output from every skeleton in the chamber at a consistent frequency: 19.4Hz — the pre-contact resonance frequency of biological structures exposed to the Codex signal. The bones had been singing, the analysis estimated, for approximately three hundred years.

In the central depression: a recording medium of unknown type, containing the audio that became Hymn I. The recording was sealed in a material the team could not identify. It opened when the team lead hummed — involuntarily, she later reported, "a melody I didn't know I knew."