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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 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]


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 here: 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.[4]

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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. Paizo staff. (2016). Campaign Preview: "The Stars are Right". In Search of Sanity, p. 90. Paizo Inc. ISBN 978-1-60125-882-3