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Titles The King in Yellow
Him Who is Not to be Named
The Unspeakable
Unnamed Lord
Home Carcosa, Material Plane
Alignment Chaotic evil
Areas of Concern Decadence
Worshipers Old Cults, lone lunatics
Cleric Alignments
Domains Chaos, Evil, Rune, Void
Subdomains Dark Tapestry, Language, Stars, Wards
Favored Weapon Rapier
Symbol The Yellow Sign: a three-armed triskelion
Sacred Animal None
Sacred Colors Yellow
Images of Hastur

Source: Bestiary 4, pg(s). 140
A cleric of Hastur holding a book inscribed with the Yellow Sign.
The power of Hastur is manifested.
Type Aberration
(chaotic, evil, Great Old One)
CR 29
Environment Any
Images of Hastur

Source: Bestiary 4, pg(s). 140

Hastur[1] is one of the cyclopean entities known as the Great Old Ones. His unholy symbol is a three-sided, tentacled device known as the Yellow Sign.[2]

Worshipers have been known to plant enchantments on victims, steering them in subtle ways toward envisioning the Yellow Sign and putting their souls in jeopardy. Congregations of the faithful devote themselves to helping Hastur manifest his avatar, drawing forth his essence in chosen sacrifice. The unfortunate victim is then unleashed upon the world for the purpose of gathering mortals for Hastur's eldritch purposes.[3]


Hastur's real appearance is unknown. In his King in Yellow avatar, he resembles a humanoid clad in tattered yellow robes and shreds of cloth, with nothing visible under these clothes. He can manifest this avatar only on planets where the light of the star around which his prison-world orbits shines.[4]


According to most texts, Hastur is imprisoned in the alien city of Carcosa, but this is doubtful when one takes into account the relative ease with which he can manifest as the King in Yellow. Carcosa seeks to constantly consume other cities and grow in size, and when it grows big enough it will burst, turning Hastur from a Great Old One into an Outer God.[4]


The cult of Hastur is rarely interested in interacting with other religions, who in turn only bother with Hastur's cultists when they impersonate their own. Since Hastur and Shub-Niggurath are said to have mated, orgiastic rituals between their cults are frequent. The churches of Groetus and Hastur grudgingly respect each other due to their shared nihilism, but rarely form long alliances. Out of Golarion's deities, only Desna actively fights against the cult of Hastur.[4]

Hastur views Xhamen-Dor as an ally, but if the cults of both deities are active on the same planet, Hastur's followers often try to send Xhamen-Dor back to Carcosa and prevent it from triggering a premature apocalypse, as the world is worth more when consumed directly by Carcosa than indirectly via Xhamen-Dor.[5]

On Golarion

Many millennia ago, during the Age of Serpents, a storm of Hastur-worshipping flying polyps landed on Golarion, hoping to infest it with the Great Old One Xhamen-Dor. They established two cities on Golarion: one at the current site of the Ustalavic town of Thrushmoor, and the other named Neruzavin in Casmaron. The former was destroyed by the serpentfolk in a massive battle that destroyed both armies, leaving only the Star Stelae as a reminder of their conflict.[6]

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Paizo published a major article about Hastur, the King in Yellow in The Thrushmoor Terror.

  1. Wikipedia article on Hastur. Original Source: Hastur was created by Ambrose Bierce in "Haïta the Shepherd", 1891; James Jacobs. (2016). The Elder Mythos. In Search of Sanity, p. 73. Paizo Inc. ISBN 978-1-60125-882-3 Hastur's portrayal in Pathfinder was inspired by The King in Yellow by Robert W. Chambers.
  2. James Jacobs. (2011). Cults of the Dark Tapestry. Wake of the Watcher, p. 65. Paizo Publishing, LLC. ISBN 978-1-60125-311-8
  3. Colin McComb. (2011). Faiths of Corruption, p. 20. Paizo Publishing, LLC. ISBN 978-1-60125-375-0
  4. 4.0 4.1 4.2 James Jacobs. (2016). Hastur, the King in Yellow. The Thrushmoor Terror, p. 69–72. Paizo Inc. ISBN 978-1-60125-892-2
  5. James Jacobs. (2016). Xhamen-Dor, the Inmost Blot. What Grows Within, p. 66. Paizo Inc.
  6. Paizo staff. (2016). Campaign Preview: "The Stars are Right". In Search of Sanity, p. 90. Paizo Inc. ISBN 978-1-60125-882-3