|Titles|| Father of Night|
the Sleeper in the Deep
|Home||Possibly K'n-Yan or N'kai|
|Areas of Concern|| Magic|
|Worshipers||Loners or outcasts|
|Domains||Chaos, Evil, Knowledge, Magic|
|Subdomains||Arcane, Divine, Thought, Whimsy|
|Favored Weapon||Short sword|
|Symbol||Crouching eyeless toad|
Source: In Search of Sanity, pg(s). 72
(chaotic, evil, Great Old One)
Source: Dreams of the Yellow King, pg(s). 84–85
Tsathoggua is the Great Old One of magic, outcasts, and the underworld. Despite his evil nature, he can sometimes be jovial or friendly toward supplicants, but Tsathoggua is unpredictable and likely to eat those he had been aiding only moments ago as he tires of their company.
Tsathoggua dwells in a vast cavern network. Some say that he rules over blue-lit K'n-Yan, while others maintain that he was driven by K'n-Yan's residents down to dark N'kai, where light dares not go.
Tsathoggua was the creator of the original formless spawn, and most of them still serve him, giving rise to their longer name: formless spawn of Tsathoggua. Formless spawn who become clerics of Tsathoggua can use their own bodies in place of an unholy symbol to cast spells.
Tsathoggua is most often worshipped as a god of magic. Most of his followers are lone outcasts and rarely gather in groups or work together; however, the presence of well-preserved temples on numerous planets suggest that this might have not been always the case. Such temples are now only inhabited by monsters, Tsathoggua's spawn, or a small group of (or just one single) clerics.
- Original Source: Clark Ashton Smith, "The Tale of Satampra Zeiros", 1929; James Jacobs. (2016). The Elder Mythos. In Search of Sanity, p. 72. Paizo Inc. ISBN 978-1-60125-882-3
- James Jacobs. (2016). The Elder Mythos. In Search of Sanity, p. 72. Paizo Inc. ISBN 978-1-60125-882-3
- James Jacobs and Todd Stewart. (2016). Bestiary. Dreams of the Yellow King, p. 85. Paizo Inc. ISBN 978-1-60125-899-1
- James Jacobs and Todd Stewart. (2016). Bestiary. Dreams of the Yellow King, p. 83. Paizo Inc. ISBN 978-1-60125-899-1