|“||There flapped rhythmically a horde of tame, trained, hybrid winged things... not altogether crows, nor moles, nor buzzards, nor ants, nor decomposed human beings, but something I cannot and must not recall.||„|
|~ HPL , "The Festival"|
Despite being loosely described, their appearance is known to be that of large creatures, with membranous wings and webbed feet. They are usually represented with some features reminiscent of those of insects.
The byakhee are creatures of about three meters, capable of flying carrying a rider and that can move floating at will in space and moving at light speed. According to Sandy Petersen's Guide to Mythos Monsters, this is possible thanks to an organ called "hune", which protects them from extreme temperatures and allows them to slightly alter the magnetic field around them, facilitating movement in the middle of a vacuum.
Byakhee need not breathe, and do not appear on Earth unless summoned by sorcerers or called by their master, Hastur. Still, there is a chance that they will go down to any planet if they need to hunt for food.
The byakhee are organized into herds and all of them answer to Hastur, who acts as their lord and patriarch. They can also submit to some magicians who summon them and act as their mounts.
The byakhee are, in short, beings who were born to be slaves.
- In kongregate's Games of Cthulhu video games for Internet browsers "The Necronomicon" and "The Necronomicon - Book of Dead Names", the byakhee appears as a low attack factor summon, but it can ignore monsters summoned by the opponent to time to attack.
- In the Persona 2: Eternal Punishment video game, the byakhee appears as a demon race called "Biyarky".
- In the Demonbane franchise, Lord Byakhee is a Deus Machina summoned thanks to the Shards of Celaeno.