The shape of this creature gives the impression of a squirming mass accompanied by an indescribable monstrous stench.
Spawn of Yog-Sothoth CR 10
CE Large aberration (extraplanar)
Init +6; Senses blindsight 30 ft., darkvision 60 ft.; Perception +20
Aura stench (30 ft., DC 22, 10 rounds)
AC 24, touch 11, flat-footed 22 (+2 Dex, +13 natural, –1 size)
hp 133 (14d8+70)
Fort +9, Ref +8, Will +12
Defensive Abilities tenuous natural invisibility; DR 10/magic; Immune cold, fire; Resist sonic 10; SR 21
Speed 30 ft., climb 30 ft.
Melee bite +17 (1d8+8/19–20/×3), 4 tentacles +16 (1d6+4 plus grab)
Space 10 ft.; Reach 10 ft.
Special Attacks blood drain (1d4 Con), devastation
Str 26, Dex 15, Con 21, Int 17, Wis 17, Cha 20
Base Atk +10; CMB +19; CMD 30 (38 vs. trip)
Feats Combat Reflexes, Improved Critical (bite), Improved Initiative, Lightning Reflexes, Multiattack, Vital Strike, Weapon Focus (tentacle)
Environment temperate hills
Devastation (Ex) As a full-round action, the spawn can assault a structure, dealing 4d6+16 points of damage to the structure in that round.
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.
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 (see page 135) 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.
A spawn of Yog-Sothoth grows quickly to Large size, but if it continues to feed, it also continues to grow, albeit at a lesser rate. 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. These sinister creatures have a wide range of strange and unusual abilities and appearances, and are usually spellcasters—typically oracles with the dark tapestry mystery (Pathfinder RPG Ultimate Magic 54) or sorcerers with the aberrant bloodline.