The Blackness from the Stars is an extraterrestrial entity in the Cthulhu Mythos. Its only appearance is in Chaosium's supplement King of Chicago for their Call of Cthulhu RPG.
Description[]
The Blackness from the Stars is an immobile blob of living, sentient darkness, torn from the primal fabric of the cosmos at the center of the universe. It is distinguishable in darkness only as a vaguely shimmering, oily patch.
The Blackness is immune to physical threats, and can regenerate itself upon harm by magical threats. Heat, cold, acid, and electricity have no effect. The entity can't endure light: direct sunlight will sear it to dust; even the dimmest light source (such as a candle) can still damage it.
The thing can enthrall nearby victims and make them slaves. Creatures within twenty miles of it can also suffer nightmares of the entity; those with histories of mental instability are most susceptible and therefore often targeted. To defend itself, it can also manipulate the air to create a vortex that spirals from itself to nearby areas.
Although intelligent, it speaks no known language and ignores attempts to communicate.
Worshipers[]
The Blackness from the Stars can telepathically enthrall nearby humans, mostly derelicts like drug fiends, drunks, and borderline personalities. Soon they will become slaves with no will of their own.
Human servants of the Blackness are driven to mutilation; all bear the scars of self-inflicted wounds. Victims are always maimed before being sacrificed to the entity.
In the Mythos[]
The Blackness from the Stars was summoned from the stars by a cult named Celestial Providence down to Chicago on Sunday, October 8, 1871 to the basement of an old Baptist Church. Its arrival caused a great conflagration that burnt down a large part of the city and trapped the thing itself in the basement in the process. While the church was demolished and turned into a vacant lot when the city was rebuilt, the basement and the entity inside is still intact.
In the 1920s, Johny Premoli of the North River Gang (probably based on the real-life North Side Gang) in Chicago along with the derelicts tried to stage a coup to overtake the gang and then used its resource to release the entity, but this plan proved unsuccessfully.