Clockwork Nautiloid

Clockwork Nautiloid CR 14

XP 38,400
N Huge construct (clockwork)
Init +9; Senses blindsense 60 ft., darkvision 60 ft., low-light vision; Perception +8


AC 31, touch 13, flat-footed 26 (+5 Dex, +18 natural, –2 size)
hp 161 (22d10+40)
Fort +7, Ref +14, Will +7
Defensive Abilities deep dweller, reflective shell; DR 10/adamantine and bludgeoning; Immune cold, construct traits
Weaknesses vulnerable to electricity


Speed 10 ft., swim 40 ft.
Melee bite +30 (2d6+10), 4 tentacles +25 (1d8+5 plus grab)
Space 15 ft.; Reach 15 ft.
Special Attacks constrict (1d8+5), tenacious grappler


Str 31, Dex 20, Con —, Int —, Wis 11, Cha 1
Base Atk +22; CMB +34 (+38 grapple); CMD 49 (can’t be tripped)
Feats Improved InitiativeB, Lightning ReflexesB
Skills Perception +8, Swim +18; Racial Modifiers +8 Perception
SQ enhanced senses, swift reactions, winding


Deep Dweller (Ex)

Clockwork nautiloids are immune to cold and damage from water pressure.

Enhanced Senses (Ex)

Clockwork nautiloids have more efficient olfactory, tactile, and visual senses than most other clockwork creatures. A clockwork nautiloid has blindsense out to a range of 60 feet and a +8 racial bonus on Perception checks.

Reflective Shell (Su)

The curved shell of a clockwork nautiloid resists magical ray attacks.

Ray spells and ray effects targeting a clockwork nautiloid are harmlessly deflected and have no effect.

Tenacious Grappler (Ex)

A clockwork nautiloid does not gain the grappled condition if it grapples a foe with its tentacles.


Environment any water
Organization solitary or pair
Treasure none

Nestled in a massive spiraled armored shell, this clockwork creature has several dozen grasping tentacles surrounding its octopus-like beak.

Clockwork nautiloids are specialized, watertight clockwork creations designed to withstand the darkest, coldest ocean depths. A clockwork nautiloid resembles an oversized nautilus with a curved and magically strengthened shell. A clockwork nautiloid is 30 feet long and weighs 4 tons. Its sharp, octopus-like beak is surrounded by dozens of tentacles that appear organic but contain rotors and pistons allowing for a strong, prehensile grip. Most of its tentacles end in a subtly serrated gripping pad, but two of them end in specialized sensory equipment shielded with durable crystal. These clusters provide the clockwork nautiloid with superior senses, allowing it to see even in the oppressive blackness of the deep ocean.

Clockwork nautiloids pursue the directives of their creators with single-minded purpose, attacking any creature that interferes with their orders. Although a clockwork nautiloid has many gripping tentacles, it can usually bring only four of these tentacles to bear in combat along with its snapping bite. Clockwork nautiloids are relentless combatants that pursue their opponents to any depth and even onto land, propelling themselves with their powerful tentacles.


A clockwork nautiloid is difficult to create, as each component must be waterproof and able to withstand the crushing pressure of the deep ocean. The creator must start with crafted clockwork pieces worth 18,000 gp.


CL 14th; Price 200,000 gp

Feats Craft Construct; Spells geas/quest, limited wish, true seeing; Special creator must be at least caster level 12th; Skill Check(s) Craft (clockwork) DC 25; Cost 109,000 gp.

Section 15: Copyright Notice

Mechanical Monsters © 2023, Legendary Games; Authors: Jason Nelson, Tom Phillips, Mike D. Welham, Matt Goodall, Alex Riggs, Matt Daley.

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