Mi-Go

"...Crustaceous bodies bearing vast pairs of dorsal fins or membranous wings and several sets of articulate limbs, and with a sort of convoluted ellipsoid, covered with multitudes of very short antennae, where a head would ordinarily be."

- Albert N. Wilmarth

Biology
The Mi-go, or "Fungi from Yuggoth", are pinkish fungoid crustacean-like organisms with wide, fan-like wings. It has six main limbs and a wrinkled head which can change color. The fungi communicate by rapidly changing the color of their heads, and project multicolored beams of light to communicate over long distances. There are many subspecies of Mi-go, and they all cooperate without difficulty. They are skilled at body modification, often altering organs and body structures on a whim. Their mentality is very different from humanity's, and it is nearly impossible for humans to understand these creatures.

Brain Cylinders
The Mi-go often transmit human brains from Earth to Yuggoth by using metal cylinder containers called brain cylinder designed to keep human brains alive despite being disembodied. The use of these brain cylinders is the reason why the Mi-go have an extensive knowledge of brain surgery with their ability of body modification.

History
The Mi-go arrived on Earth during the Jurassic period, fighting off attacks from the Elder Things and eventually settling in the northern hemisphere. They have gradually lost terrain, and today they inhabit the Andes, Himalayas, and Appalachians.

Pathfinder Mi-go
In Paizo Publishing's "Pathfinder" universe, countless worlds throughout the galaxy have been colonized by the Mi-go and their numbers are endless. Masters of both magic and technology, the Mi-go have merged them to create impossible devices that shape reality. Any world that possesses sentient life of interest to the Mi-go, is infiltrated by the Mi-go who manipulate the species to better serve the agenda of the Mi-go. The ulimate goal of the Mi-go is to become the masters of the universe.

Eldritch Skies Mi-go
In Savage Worlds' "Eldritch Skies" universe, the Mi-go are the Milky Way's dominant spacefaring power and control hundreds of worlds within 1,200 light years of Earth. The Mi-go oppose the Great Old Ones, considering them a destructive force in the cosmos and therefore constantly monitor their dimensional prison, to make sure the Old Ones don't get out. It's because of their fear and hatred of the Old Ones that the Mi-go maintain relations with mankind and have even provided them with technology, due to the fact that R'lyeth is located on Earth.

Delta Green Mi-go
In Pelgrane Press' "Delta Green" universe, mankind has been manipulated by the Mi-go for millennia. It's not known why the Mi-go have been manipulating human society, it's governments and corporations, and so on. At present they control the United States via an alliance with Majestic-12, a secret government organization. Majestic-12 itself knows very little about the Mi-go, but they are aware that they are active elsewhere in the cosmos.

When it comes to the Great Old Ones, the Mi-go are in opposition to the eldritch entities. They envy the power the Old Ones have over energy but despise them as the Mi-go are a force for Order while the Old Ones are a force for Chaos. It's the goal of the Mi-go to learn how to manipulate all types of energy, including magic. Over time they have become quite skilled at manipulating energy but their ability pales in comparison to that of the Old Ones. The ultimate goal of the Mi-go is not be become transcendent beings like the Old Ones but to continue evolving and one day become gods.

CthulhuTech Mi-go
In Sandstorm Productions' "CthulhuTech" universe, the Migou control a vast intergalactic empire. In the solar system, the Mi-go have a worldship, that mankind knows as the dwarf planet Pluto. The Migou are at war with mankind, both with its colonies in the solar system and with Earth itself. In the mid 21st century, they attempted to enslave it with a genetically engineered human slave army in an earlier war. In which Earth was devastated and approximately 40% of its population killed, until the slave army revolted and defected to the humans.

A decade later, the Migou decided to conquer Earth themselves and started another devastating war. In the process conquering the polar regions, Greenland, Iceland, Alaska, Scandinavia, Tasmania, most of Russia, and a good chunk of Canada. Unfortunately for the Migou, within a few years of the campaign everything changed. The return of the Great Old Ones had begun, with the Hastur-controlled "Rapine Storm" and the Cthulhu-controlled "Esoteric Order of Dagon". The insane murderously sadistic hordes of the Rapine Storm have ravaged Central Asia, China, northern South Asia, and most of Southeast Asia. In turn the alliance of cultists and Deep Ones of the Esoteric Order of Dagon now controls the seas and most of the world's coastline. Mankind controls the rest, territory which is steadily shrinking in size, while the Nyarlathotep-controlled Chrysalis Corporation (the world's most powerful megacorp) undermines mankind from within. The Migou hate and fear the Old Ones, and realize what is happening, unfortunately due to the Migou and humans being completely different, they are unlikely to join forces against the Old Ones.

Appearances

 * The Whisperer in the Darkness, by H.P. Lovecraft
 * At the Mountains of Madness, by H.P. Lovecraft
 * Through the Gates of the Silver Key, by H.P. Lovecraft
 * S. Peterson's Field Guide to Cthulhu Monsters, by Sandy Peterson
 * Eldritch Skies (Savage World Edition) Roleplaying Game, by Battlefield Press
 * Pathfinder Roleplaying Game, by Paizo Press
 * CthulhuTech Roleplaying, by Sandstorm Productions
 * Delta Green Roleplaying Game, by Pelgrane Press