Sandy Petersen's Cthulhu Mythos - Pathfinder


CR 20; XP 307,200
CE Great Old One of deep cavern networks, impossibility, and oblivion
Primary Source Henry Kuttner, “The Salem Horror”


Domains Chaos, Darkness, Evil, and Madness
Subdomains Entropy, Insanity, Loss, Night
Favored Weapon club
Symbol inkstain with spiraling pattern radiating outward
Temple deep basements, caverns, lightless places
Worshipers blind maniacs, cave-dwelling monsters, suicidal cultists
Servitors oozes

Influence Stage 1 (DC 27)

Area 900-foot radius
Proxy avatar of Nyogtha
Effects multiplicity
Escalation When Nyogtha manifests a second simultaneous avatar, its influence increases to stage 2.

Influence Stage 2 (DC 29)

CR 23; XP 819,200
Area 1-mile radius
Proxy avatars of Nyogtha
Effects multiplicity
Escalation When Nyogtha manifests a sixth simultaneous avatar, its influence increases to stage 3.

Influence Stage 3 (DC 31)

CR 26; XP 2,457,600
Area 100-mile radius
Proxy avatars of Nyogtha
Effects multiplicity


Combat Once all active avatars of Nyogtha are destroyed in an influence’s area, the influence ends.

Influence Effects

Multiplicity Nyogtha can exist in multiple places at the same time. When its influence is first established, only one avatar of Nyogtha is active. As that avatar feeds, Nyogtha gains the ability to manifest more than one avatar at the same time, appearing at any point it desires within the area of its influence. See the statistics for Nyogtha’s avatar below for what can cause it to manifest a new incarnation.

Avatar of Nyogtha (CR 20)

XP 307,200
CE Huge ooze
Init +15; Senses see in darkness, tremorsense 360 ft.; Perception +30


AC 35, touch 19, flat-footed 24 (+11 Dex, +16 natural, –2 size)
HP 367 (21d8+273); fast healing 15
Fort +20, Ref +20, Will +18
Defensive Abilities all-around vision, DR 15/epic and lawful; Immune ability damage, ability drain, acid, aging, blindness, cold, death effects, disease, energy drain, mind-affecting effects, paralysis, petrification, poison, ooze traits; Resist fire 30; SR 31


Speed 50 ft., climb 50 ft.
Melee 4 bites +28 (3d6+15/19–20 plus grab)
Space 15 ft.; Reach 15 ft.
Special Attacks duplication, fast swallow, oblivion, swallow whole (20d6 damage, AC 18, 36 hp)

Spell-Like Abilities (CL 20th; concentration +27)
At will—black tentacles, deeper darkness, enervation, greater dispel magic, nightmare (DC 22)
3/day—demand (DC 25), disintegrate (DC 23), quickened feeblemind (DC 22)
1/day—power word blind, symbol of insanity (DC 25)


Str 40, Dex 33, Con 36, Int 22, Wis 29, Cha 25
Base Atk +15; CMB +32 (+36 grapple); CMD 53 (can’t be tripped)
Feats Combat Reflexes, Critical Focus, Improved Critical (bite), Improved Initiative, Improved Vital Strike, Iron Will, Lightning Reflexes, Power Attack, Quicken Spell-Like Ability (feeblemind), Staggering Critical, Vital Strike
Skills Climb +44, Knowledge (arcana) +27, Knowledge (dungeoneering) +30, Knowledge (religion) +27, Perception +30, Sense Motive +30, Spellcraft +27, Stealth +24
Languages Aklo; telepathy 100 ft.
SQ no breath

Special Abilities

Duplication (Ex) Whenever Nyogtha kills a creature by reducing it to powder (either with its oblivion ability or after swallowing a creature whole), a new avatar of Nyogtha manifests within the Great Old One’s area of influence at any point chosen by the Great Old One. This duplication effect can only occur once per day, regardless of how many avatars are currently active. Up to 10 avatars of Nyogtha can exist at a time in a single area of influence.

Oblivion (Su) Whenever a creature takes damage from one of Nyogtha’s bites, there’s a chance that the victim is fully subjected to the impossibility of the Thing that Should Not Be. This chance is equal to 2% per bite when Nyogtha’s influence is at stage 1, 5% per bite when the influence is at stage 2, and 20% per bite when the influence is at stage 3. The chance of being subjected to oblivion doubles if the bite is a successful critical hit. If the victim is so subjected, it must make a successful DC 27 Fortitude save to resist taking an additional 100 points of damage. If this attack reduces the creature to 0 hp or less, it is slain immediately and reduced to powder. The save DC is Charisma-based.

Swallow Whole (Ex) A creature swallowed whole by Nyogtha takes 20d6 points of damage per round. If this damage reduces a creature to 0 hit points, it is immediately slain and reduced to powder. If a creature manages to cut its way out of Nyogtha, the Great Old One’s body flows together after the victim escapes— additional swallowed victims must cut their own way out.

Nyogtha is called the “Absence of Light” and the “Thing That Should Not Be.” While it takes a definite shape (if malleable), it is a negativity—a sort of hole in creation. It is covered with blind mouths and sharp teeth, though its utterly black outline seems blurry to mortal eyes.

Nyogtha inhabits the depths of a planet normally, but it has no fear of the surface. Light does not harm it—instead, Nyogtha absorbs any light directed at it. Worshipers of Nyogtha make their shrines at entrances to the underworld or build subterranean complexes for their god to roam.

Nyogtha in Combat

Nyogtha can exist in multiple places at the same time. Thus, while Nyogtha assaults enemies deep within its lair, it can also block the entrance to prevent them from escaping, and attack their home town all at once. If one of its avatars is killed (not an insuperable task), there are many more—indeed, Nyogtha can replicate itself infinitely.

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