Mythic Spawn of Yog-Sothoth

Mythic Spawn of Yog-Sothoth CR 12/MR 5

XP 19,200
CE Large aberration (alien, extraplanar, mythic, mythos)
Init +11MF; Senses blindsight 30 ft., darkvision 60 ft.; Perception +20
Aura nauseating stench (30 ft., DC 24, 10 rounds)


AC 29, touch 11, flat-footed 27 (+2 Dex, +18 natural, –1 size)
hp 201 (14d8+138); regeneration 10 (good or lawful)
Fort +11, Ref +8, Will +12
Defensive Abilities tenuous natural invisibility; DR 10/epic and magic; Immune cold, fire; Resist sonic 10; SR 26


Speed 30 ft., climb 30 ft.
Melee bite +17 (1d8+8/19–20/×3), 4 tentacles +18 (1d6+12 plus grab)
Space 10 ft.; Reach 10 ft.
Special Attacks blood drain (1d4 Con), chronal sink, devastation, iridescent globes, mythic power (5/day, surge +1d8), powerful blows (tentacle)
Spell-Like Abilities (CL 14th; concentration +19)


Str 26, Dex 15, Con 25, Int 17, Wis 17, Cha 20
Base Atk +10; CMB +19 (+24 grapple); CMD 31 (39 vs. trip)
Feats Combat Reflexes, Improved Critical (bite), Improved Initiative, Lightning Reflexes, Multiattack MF, Vital Strike, Weapon Focus (tentacle)
Skills Climb +33, Escape Artist +19, Intimidate +22, Knowledge (arcana) +20, Perception +20, Spellcraft +20, Stealth +15
Languages Aklo


Chronal Sink (Su)

As a standard action every 1d4 rounds, a mythic spawn of Yog-Sothoth can emit a 30-foot-radius burst that dislocates affected creatures from the shared timestream.

Creatures that fail a DC 24 Will save are slowed (as per slow, or as per mythic slow if the mythic spawn of Yog-Sothoth expends one use of its mythic power as a free action when activating the ability) for 14 rounds or, if already slowed by this effect, paralyzed and frozen in place (as per hold monster) for the same duration. As these conditions result from a subjective time manipulation effect, spells such as freedom of movement do not negate them. The save DC is Charisma-based and has a +2 racial bonus.

Devastation (Ex)

When a mythic spawn of Yog-Sothoth performs a full-attack action, it deals double damage to structures and Large or larger objects.

Iridescent Globes (Su)

As a standard action every 1d4 rounds, a mythic spawn of Yog-Sothoth can emit a number of 1-footdiameter iridescent globes equal to its mythic rank (5 for most mythic spawns of Yog-Sothoth) that immediately fly to attack one or more creatures of the spawn’s choosing within 60 feet before disappearing. Each globe makes a +11 ranged touch attack, and a creature struck by a globe must succeed on a DC 24 Will save or be shunted forward in time 1d4 rounds. An affected creature immediately disappears and then reappears at the same location at the later time; for the affected creature, it’s as if no time passed. An affected creature can choose to resist being shifted forward in time, but the spacetime flux rips and tears at it. For each round the affected creature wishes to reduce from the duration it is shunted into the future, it takes 4d6 points of damage. Creatures that succeed at their saves are staggered for 1 round. The save DC is Charisma-based and has a +2 racial bonus.

Nauseating Stench (Ex)

A mythic spawn of Yog-Sothoth exudes a hideous, unforgettable stench that nauseates living creatures within 30 feet for 10 rounds (DC 24 Fort negates).

Creatures that successfully save are sickened for 1 round but cannot otherwise be affected by the same spawn’s nauseating stench for 24 hours. A delay poison or neutralize poison spell removes the effect from a nauseated or sickened creature.

Creatures with immunity to poison are unaffected, and creatures resistant to poison receive their normal bonus on their saving throws. The save DC is Constitution-based.

Tenuous Natural Invisibility (Ex)

This functions like natural invisibility, except it is subject to invisibility purge and effects that outline invisible creatures (such as glitterdust and faerie fire). It cannot be dispelled.


Environment temperate hills
Organization solitary
Treasure standard

The shape of this creature gives the impression of a squirming mass accompanied by an indescribable monstrous stench.

These monstrous abominations resembles in part an ordinary humanoid, animal, or other creature, but what remains of its original form is only all the more horrible in contrast the portions of its physique that dissolve into a bloated, inchoate mass of otherworldly hideousness. Its overall shape gives the impression of a squirming mass accompanied by an indescribable monstrous stench. A spawn of Yog-Sothoth has a prodigious hunger, and given sufficient food it grows quickly to Large size, and rare specimens continue to stretch and strain until their seams literally burst into new fleshy tendrils and protuberances. A truly ancient spawn of Yog-Sothoth can be the size of a barn or even a small hill.

Not all spawn of Yog-Sothoth are massive or inhuman.

Some (often twins to their more monstrous kin) remain roughly humanoid in shape and size, although their deformities still require them to wear disguises or layers of baggy clothing if they want to walk unchallenged in civilized regions.

The spawn of Yog-Sothoth are begotten upon the world as the results of vile rituals in which cultists call down the essence of Yog-Sothoth, an Outer God from beyond the stars to impregnate a humanoid creature. The Outer God is not of this dimension or world; only by incorporating flesh and bone of a mortal can its spawn exist. Upon death, a spawn’s flesh rapidly melts until nothing remains but a crusty stain.

Although the spawn of Yog-Sothoth are naturally invisible, they exude a hideous, unforgettable stench that alerts others to their presence.

Ancient legend holds that the spawn of Yog-Sothoth are inflicted upon a world to clear it of all sane life and to prepare the way for the return of the Great Old Ones. But it’s just as likely that the carnage and mayhem it brings upon the world is due to its ravenous and constant hunger for blood as any agenda from masters beyond the stars.

Section 15: Copyright Notice

Mythos Monsters (PF1) © 2022, Legendary Games; Authors Jason Nelson, Jim Groves, Jonathan Keith, Tom Phillips, Alistair J. Rigg, and Greg A. Vaughan

scroll to top