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Star-Spawn of Cthulhu

Star-Spawn of Cthulhu CR 20

A mountainous form lumbers to life, a hideous creature only accidentally humanoid in shape, its hateful face a writhing mass of tentacles.

XP 307,200
CE Huge aberration
Init +10; Senses blindsight (thought) 30 ft., darkvision 60 ft.; Perception +34
Aura frightful presence (150 ft., DC 25, 3d6 hours)


EAC 35; KAC 37
Fort +21, Ref +21, Will +19
Defensive Abilities amorphous, immortality, overwhelming mind, regeneration 15 (fire)
Immunities cold, disease, poison; SR 31


Speed 40 ft., fly 60 ft. (Ex, average), swim 40 ft.
Melee claw +34 (6d12+36)
Multiattack 2 claws +28 (6d12+36), 4 tentacles +25 (8d6+36 plus grab)
Space 15 ft.; Reach 30 ft.
Offensive Abilities overwhelming mind
Spell-Like Abilities (CL 20th)

6th (1/day)interplanetary teleport, mass suggestion (DC 25)
5th (5/day)break enchantment, greater dispel magic, greater command (DC 24), mind thrust (DC 24)
At willconfusion (DC 23), mind probe (DC 23)
Constantprivate sanctum, true seeing


Str +16, Dex +6, Con +9, Int +6, Wis +6, Cha +6
Feats Improved Critical, Mystic Strike
Skills Acrobatics +34, Athletics +39 (+47 when swimming), Intimidate +34, Mysticism +34, Physical Science +16, Sense Motive +16, Survival +16
Languages Aklo; telepathy 300 ft.
Other Abilities compression, limited starflight, no breath


Immortality (Ex)

A star-spawn of Cthulhu does not age, nor does it need to eat or breathe. Only violence can bring about the death of one of these creatures.

Limited Starflight (Ex)

A star-spawn of Cthulhu can survive in the void of outer space, and its wings allow it to use its fly speed in outer space despite the lack of air. However, a star-spawn of Cthulhu’s ability to fly in outer space does not allow it to reach unusual speeds. When it wishes to fly to another world, the creature relies entirely upon its immortality and patience to complete the journey. When speed is required, it instead uses its interplanetary teleport ability to make the journey quickly.

Overwhelming Presence (Ex)

A star-spawn of Cthulhu is overwhelming in its power and alien structure. The first time a creature other than an outsider (excluding native outsiders) or aberration makes mental contact with a star-spawn of Cthulhu, it must succeed at a DC 25 Will save or be Stunned”>stunned for 1d6 rounds. On a successful save, the creature is merely staggered for 1 round.

This effect can occur whether the star-spawn of Cthulhu initiates mental contact (such as via its mind probe spell-like ability or once per round merely by telepathic communication) or another creature attempts to do so (via spells such as detect thoughts, hologram memory, mind link, mind probe, etc.). Once a creature is exposed to a specific star-spawn of Cthulhu’s overwhelming presence, it is immune to this effect from all star-spawn of Cthulhu for 24 hours. This is a mind-affecting effect.


Environment any underground
Organization solitary, pair, or cult (3–6)

Of all the strange and malefic denizens of the void between the stars, few cause the same terror as this titanic race. They hail from a mad star whose light cannot be seen by conventional telescopes, and the smallest of these behemoths stand nearly 30 feet in height. Humanoid in shape, their immense bodies have rubbery flesh that seems to wriggle and seethe like a half-solidified ooze.

Tremendous draconic wings, murderous taloned hands, and a tentacled visage that evokes the alien gaze of an octopus complete the being’s monstrous shape. This malevolent race has a name, yet it is no name known to the sane.

Among mortal scholars, they are known merely by the name of their greatest priest—they are the star-spawn of Cthulhu. The star-spawn of Cthulhu have a strange, mutable anatomy—their form is not fixed. They can absorb parts of their bodies or enlarge others at will, a trait they often use on their claws or tentacles to dramatically extend their reach in combat beyond what might normally be possible for a creature of the same shape and size. Despite this mutable shape, the star-spawn’s forms generally don’t deviate far from that of an octopus-headed, winged humanoid, likely because of the powerful links their otherworldly minds have to their overlord and master, who lies dead but dreaming in the lost city of R’lyeh. Although they typically appear as immense humanoid creatures with rubbery hides and octopoid heads, the star-spawn of Cthulhu are not any more aquatic in nature than they are terrestrial—that they’re often associated with a planet’s oceans lies more in the simple fact that oceans often cover the majority of a planet’s surface. The creatures themselves, being equally at home on land, at sea, or in the depths of space, make no real distinction between such regions, choosing them as the sites of their cities and temples for purposes only they can know.

Section 15: Copyright Notice

Alien Bestiary (Starfinder) © 2018, Legendary Games; Lead Designer: Jason Nelson. Authors: Anthony Adam, Kate Baker, John Bennet, Eytan Bernstein, Robert Brookes, Russ Brown, Duan Byrd, Jeff Dahl, Robyn Fields, Joel Flank, Matt Goodall, Robert J. Grady, Jim Groves, Steven T. Helt, Thurston Hillman, Tim Hitchcock, Nick Hite, Daniel Hunt, Mike Kimmel Marshall, Isabelle Lee, Jeff Lee, Lyz Liddell, Jason Nelson, Richard Pett, Tom Phillips, Alistair J. Rigg, Alex Riggs, Wendall Roy, Mike Shel, Neil Spicer, Todd Stewart, Russ Taylor, Rachel Ventura, Mike Welham, George Loki Williams, Scott Young.