📚 Mycelia Prime

Mycelia Prime is a world that has never seen the sun. It exists entirely beneath the stone — a vast subterranean network of caverns, deep-water channels, bioluminescent groves, and ancient mycorrhizal highways that predate every civilisation currently fighting over them. The Spore-Mother's mycelial web connects it all, a living infrastructure older than memory, threading through the rock like the world's own nervous system.

For most of its history, Mycelia Prime was quiet. The Myconids tended their groves, maintained the network, and measured time in spore-cycles rather than years. The Spore-Mother was not a god in any sense they would have recognised — she was more like a fact of life, the way gravity is a fact of life. Present, foundational, not worshipped so much as simply known. That ended in Year 0.

Something fell through the ceiling of the world. Not metaphorically — literally. A people called the Pulse-Linked, refugees from a catastrophe in the Far Realm, crashed through the stone in a vessel of impossible technology and landed in the heart of Myconid territory. They brought with them the Prime Beacon, a device designed to sustain their biological network dependency, and they activated it immediately because without it they would die.

The Prime Beacon poisoned the Spore-Mother's ecosystem within months.

What followed was not a war in the conventional sense. It was a slow, grinding, thousand-year catastrophe that became a war because neither side could afford to stop. The Myconids fought to protect a network that was being systematically corrupted. The Pulse-Linked fought to protect a device they could not survive without. Both sides were right. Both sides caused irreversible harm. The body count accumulated with the particular relentlessness of conflicts where everyone involved has legitimate grievances and none of them have anywhere else to go.

The shape of the conflict changed in Year 980. The Spore War had been running for nine hundred and eighty years when Mycos the Unbreakable — the greatest warrior the Myconids had ever produced — disobeyed direct orders and struck the Prime Beacon himself, the most significant offensive blow of the war, and the act that inadvertently triggered everything that came after. The Pulse-Linked, facing the imminent failure of their life support, attempted an emergency overclock of the damaged Beacon. The overclock punched through dimensions they did not fully understand. Something heard it.

K'varn arrived.

What K'varn is, precisely, remains a matter of theological and philosophical debate among the scholars of the deep. A cosmic predator. An entity from the spaces between realities. Something that feeds on networked consciousness the way other things feed on light or heat. It parasitised the Prime Beacon in moments and used it to broadcast a signal through every Pulse-Linked neural connection simultaneously. Eighty-seven percent of the Pulse-Linked were enslaved between one breath and the next. They became the Crimson Thrall — their cyan bioluminescence burning red, their will replaced, their bodies repurposed as K'varn's infantry in a war that now had three sides instead of two.

The thirteen percent who survived did so by severing their network connections before the signal fully propagated. They became the Severed — alive, free, and functionally disabled, their biological dependency on the network now a constant source of pain rather than sustenance. They fight under no banner and trust no faction, including the Myconids who have been trying to kill their people for a thousand years and the Pulse-Linked majority who are now actively trying to finish the job K'varn started.

It is now Year 1000.

Elder Lyra leads the Fungal Reclamation from the deep groves, the last and oldest of the Myconid Elders, carrying the weight of every decision made in the last millennium. Mycos — the greatest hero the Myconids ever produced, the warrior who struck the Beacon and accidentally summoned K'varn, the creature who was imprisoned by Lyra in Year 980 and freed by her in Year 985 and banished by the Spore-Mother herself shortly after — is gone, his fate unknown, his absence a wound in the Reclamation that has not closed. K'varn consolidates its hold on the deep, patient and unhurried, feeding on the network it has claimed while its Thrall armies continue the war on its behalf. The Severed survive in the margins, led by figures like Veylar — half-severed, one eye cyan and one eye red, belonging fully to neither world.

Nobody is winning. Everybody has been losing for a very long time. The question that defines Year 1000 is not who will win the war, but whether anyone will find a way to end it before there is nothing left worth saving.

The creatures in this collection are built for that world. They carry its history in their stat blocks and its grief in their narrative descriptions. Some are allies. Some are enemies. Most are both, depending on when you meet them and what you need from them.

You are welcome to use them as written, adapt them for your own setting, or let them inspire something entirely new. The Spore-Mother's network reaches further than anyone has mapped.