Home >Game Mastering >Bestiary >NPCs >

Deep One Elder

Deep One Elder CR 14

XP 38,400
CE Gargantuan monstrous humanoid (aquatic)
Init +5; Senses darkvision 60 ft., low-light vision; Perception +24
Aura resistant aegis (DC 19), staggering presence (180 ft., DC 21)


HP 215; EAC 27; KAC 28
Fort +14; Ref +14; Will +17
Defensive Abilities regeneration 10 (fire); mind reflection; Immunities cold, disease; Resistances acid 10, electricity 10; DR 10/magic and piercing; SR 25


Speed 30 ft., swim 60 ft.
Melee bite +23 (2d8+13 P) or claw +23 (2d6+13 S)
Multiattack bite +23 (4d8+14 P), 2 claws +21 (3d6+14 S)
Space 20 ft.; Reach 20 ft.
Offensive Abilities devastating strike, trample (2d8+13 B, DC 30)
Spell-Like Abilities (CL 14th)

Constantresistant aegis (DC 19)
At willhold person (DC 16)
3/daycosmic eddy (DC 18), confusion (DC 18)
1/daydominate person (DC 19), mass suggestion (DC 20)
1/weekplanar binding (entities of CR 10 or lower; DC 20)


Str +8; Dex +0; Con +4; Int +3; Wis +4; Cha +3
Skills Culture +25, Intimidate +30, Mysticism +25, Perception +30, Sense Motive +25
Languages Aklo, Common
Other Abilities amphibious, deep dweller, deific, immortal


Deep Dweller (Ex)

Deep ones are immune to damage from water pressure; their bodies are capable of instantly adjusting to different water depths or even the surface with ease.

Devastating Strike (Ex)

An elder deep one ignores the first 10 points of hardness when it damages an object with its claws. A creature struck with a critical hit from an elder deep one’s claw must succeed at a DC 22 Fortitude save or be stunned for 1 round. The save DC is Strength– based.

Deific (Su)

An elder deep one can grant divine spells to its worshipers. Granting spells does not require any specific action on the elder deep one’s behalf. Elder deep ones grant access to the domains of Chaos, Evil, Madness, and Water. Their symbols vary, but their favored weapon is the claw.

Immortal (Ex)

A deep one does not age. Barring death from violence, disease, or misadventure, a deep one can live forever. Deep ones are immune to effects that cause magical aging.

Mind Reflection (Ex)

Any mind-affecting effect that fails to affect an elder deep one is reflected back on the source, treating the elder deep one as the controller and source of the spell.

Staggering Presence (Ex)

This ability functions as frightful presence, except that a creature that fails its save is also staggered as long as it remains in the area of effect, and for an additional 1d6 rounds after leaving that area. This is a mind-affecting fear effect.


Environment any water
Organization solitary or pair

A few deep ones never stop growing over the eons of their endless lives. Many elder deep ones claim the names of monsters or gods for their own—Mother Hydra and Father Dagon being two of the more legendary of their kind. Elder deep ones ascend to the status of near-gods in deep one society, towering over their kin and ruling their sunken cities. Just as they are worshiped, so do the elder deep ones worship the Great Old Ones and Outer Gods themselves.

Section 15: Copyright Notice

Alien Codex (Starfinder) © 2019, Legendary Games; Lead Designer: Jason Nelson. Authors: Anthony Adam, Kate Baker, John Bennet, Eytan Bernstein, Robert Brookes, Russ Brown, Duan Byrd, Paris Crenshaw, 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, Jeff Provine, Alistair J. Rigg, Alex Riggs, Wendall Roy, Mike Shel, Neil Spicer, Todd Stewart, Russ Taylor, Rachel Ventura, Mike Welham, George Loki Williams, Scott Young.