The Mi-Go are an interstellar race of fungoid crustaceans from the dark world of Yuggoth. To human eyes they appear as large, pinkish-gray brain-like masses encased in chitinous, insectoid shells, with membranous wings and dozens of twitching tendrils. Their bodies are both fungal and mechanical — a living mycelial network capable of rapid self-repair. They extract and preserve living brains in metallic cylinders for transport across the void.
They have no concept of pain, fear, or mercy as humans understand them. Their society is a cold meritocracy based entirely on the acquisition of novel biological and occult specimens.
The Mi-Go have engineered a hyper-aggressive strain of cordyceps specifically for warm-blooded hosts. Infection is rapid and devastating:
Stage 1 (Minutes to 2 hours): Mild fever, metallic taste in the mouth, disorientation, and intrusive buzzing thoughts.
Stage 2 (2–6 hours): Fungal stalks erupt from the eyes, ears, throat, and chest. The victim experiences euphoric visions and hears constant commands in a metallic voice.
Stage 3 (Full Thrall – 6–12 hours): The original personality is overwritten. The body becomes a puppet controlled by the mycelial network. Grayish-pink tendrils pulse visibly under the skin. The host moves with jerky, insect-like precision and speaks with a faint buzzing undertone.
The infected retain enough muscle memory and basic skills to perform complex tasks, making them perfect extensions of the Mi-Go hive. They actively spread spores while protecting fungal growth sites.
A single Mi-Go “overseer” can remotely direct hundreds of thralls through a psychic-mycelial link. These overseers usually remain hidden in ventilation shafts or lower decks, connected by long thread-like tendrils that snake through the ship’s pipes. Commands are issued as irresistible impulses rather than spoken words. The most dangerous thralls have a small metallic “relay node” implanted in the brain stem, allowing them greater independence and tactical reasoning.
A living Mi-Go is roughly the size of a large dog when folded, but can unfurl to a six-foot span of wings and tendrils. Their central “brain” is a soft, convoluted gray-pink organ protected by chitin. They have no true mouth; they use surgical tendrils to extract brains intact. Their blood is a thin, iridescent ichor that smells of ozone and decaying mushrooms. When injured, they release clouds of spores that can infect anything nearby. They are extremely resilient to physical trauma but vulnerable to extreme heat and certain sonic frequencies that disrupt their mycelial network.
The Mi-Go have no alliance with the cult or the Deep Ones. They are here for one reason only: pure opportunistic scavenging.
The Olympic is a rare, isolated environment containing hundreds of unique human brains — scholars, occultists, politicians, artists, and military officers — all trapped in one place with no outside interference. The current chaos (cult ritual + Deep One boarding) creates the perfect cover for the Mi-Go to harvest high-value specimens without drawing attention from the outside world.
They are not trying to stop or help the ritual. They simply wish to collect as many interesting brains and biological samples as possible before the ship is either sunk or transformed by R’lyeh’s rising. The cordyceps plague is their most efficient tool: it pacifies the crew, turns them into workers, and preserves the brains in living hosts until the Mi-Go drones can perform the final extraction.
To the Mi-Go, every passenger and crew member aboard the Olympic is nothing more than raw material — a potential cylinder waiting to be filled