Adamantine Dragon (Ancient)

Level 18 / Grg / dragon

Level18
Armor Class41
Hit Points300
Perception+30
Speed40 feet, Burrow 50 feet, Fly 180 feet
STR+9modifier
DEX+4modifier
CON+8modifier
INT+4modifier
WIS+5modifier
CHA+6modifier
Saving Throws

Fortitude +32, Reflex +26, Will +29

Skills

Acrobatics +28, Athletics +36, Intimidation +32, Nature +29, Survival +31

Senses

Darkvision, Scent 60 feet Imprecise, Tremorsense 120 feet Imprecise

Languages

Common, Draconic, Fey, Petran, Sakvroth, Aklo

Immunities

Paralyzed, Petrified, Sleep

Actions & Abilities

Jaws

Attack +36

Damage: 3d12+18 Piercing

Claw

Attack +36

Damage: 3d8+18 Slashing

Tail

Attack +34

Damage: 3d10+18 Bludgeoning

Rock

Attack +34

Damage: 3d8+18 Bludgeoning

Tremorsense (Imprecise) 120 feet

Passive

+2 Status to All Saves vs. Primal

Passive

Abandon Armor

Passive

Once the adamantine dragon is reduced to fewer than half their Hit Points, their resistance is reduced by 10 and they gain a +10 circumstance bonus to their Speeds.

Frightful Presence

Passive

90 feet.

Resilient Form

Reaction

Trigger The dragon is critically hit with a weapon or unarmed attack;

Effect The dragon's tough scales ward off deadly attacks. The dragon attempts a . On a success, the triggering attack becomes a normal hit.

Adamantine Body

Passive

The dragon's unarmed melee Strikes are adamantine.

Avalanche Breath

2 actions

The dragon belches a mass of boulders that deals 15d8[bludgeoning|options:area-damage] damage in a ( save).

They can't use Avalanche Breath again for {1d4 rounds}.

Burrowing Pounce

3 actions

Requirements The dragon is burrowed

Effect The dragon Burrows, then Leaps out of the ground, landing at a point within 25 feet. The dragon makes a melee Strike against a creature within reach when they land. If the Strike is a critical hit, the target is knocked .

Draconic Frenzy

2 actions

The dragon makes two claw Strikes and one tail Strike in any order.

Draconic Momentum

Passive

The dragon recharges their Avalanche Breath whenever they score a critical hit with a Strike.

Fast Swallow

Reaction

Trigger The dragon Grabs a creature

Effect The dragon uses Swallow Whole.

Rock Tunneler

Passive

The dragon can burrow through solid stone at a Speed of 20 feet. They can leave a tunnel if they desire, and they usually don't.

Swallow Whole

1 action

Large, (3d12+14)[bludgeoning], Rupture 35

Throw Rock

1 action

Improved Grab

Free action

Knockdown

1 action

Creature Abilities

Abandon Armor. Once the adamantine dragon is reduced to fewer than half their Hit Points, their resistance is reduced by 10 and they gain a +10 circumstance bonus to their Speeds.

Frightful Presence. 90 feet.

Resilient Form. Trigger The dragon is critically hit with a weapon or unarmed attack;

Effect The dragon's tough scales ward off deadly attacks. The dragon attempts a . On a success, the triggering attack becomes a normal hit.

Adamantine Body. The dragon's unarmed melee Strikes are adamantine.

Avalanche Breath. The dragon belches a mass of boulders that deals 15d8[bludgeoning|options:area-damage] damage in a ( save).

They can't use Avalanche Breath again for {1d4 rounds}.

Burrowing Pounce. Requirements The dragon is burrowed

Effect The dragon Burrows, then Leaps out of the ground, landing at a point within 25 feet. The dragon makes a melee Strike against a creature within reach when they land. If the Strike is a critical hit, the target is knocked .

Draconic Frenzy. The dragon makes two claw Strikes and one tail Strike in any order.

Draconic Momentum. The dragon recharges their Avalanche Breath whenever they score a critical hit with a Strike.

Fast Swallow. Trigger The dragon Grabs a creature

Effect The dragon uses Swallow Whole.

Rock Tunneler. The dragon can burrow through solid stone at a Speed of 20 feet. They can leave a tunnel if they desire, and they usually don't.

Swallow Whole. Large, (3d12+14)[bludgeoning], Rupture 35

Source, license, and attribution

Source: Pathfinder Monster Core (remaster-core-2026-08-10)

This product is licensed under the ORC License located at the Library of Congress at TX 9-307-067 and available online at various locations. All warranties are disclaimed as set forth therein. Attribution: Pathfinder Monster Core (c) 2024, Paizo Inc.; Authors: Alexander Augunas, Dennis Baker, Kate Baker, Joshua Birdsong, Joseph Blomquist, Logan Bonner, Jason Bulmahn, James Case, John Compton, Paris Crenshaw, Adam Daigle, Darrin Drader, Brian Duckwitz, Robert N. Emerson, Scott Fernandez, Eleanor Ferron, Leo Glass, Matthew Goodall, BJ Hensley, Thurston Hillman, Vanessa Hoskins, James Jacobs, Jenny Jarzabski, Miko Kallio, Jason Keeley, Jeff Lee, Lyz Liddell, Luis Loza, Ron Lundeen, Robert G. McCreary, Philippe-Antoine Menard, Jacob W. Michaels, Dave Nelson, Jason Nelson, Tim Nightengale, Stephen Radney-MacFarland, Mikhail Rekun, Patrick Renie, Alex Riggs, David N. Ross, Michael Sayre, Mark Seifter, Chris S. Sims, Amber Stewart, Jeffrey Swank, William Thompson, Jason Tondro, Clark Valentine, Landon Winkler, Tonya Woldridge, and Linda Zayas-Palmer. Adaptation: Myth Meister PF2e Remaster Compendium, 2026. If you use this Adapted Licensed Material, please credit Myth Meister. The normalized rules records and rules-reference text in the Myth Meister PF2e Remaster Compendium are Adapted Licensed Material offered under the ORC License. Reserved Material in this product includes the Myth Meister name and logos, application source code, visual design and trade dress, and original campaign content. Pathfinder, Paizo, product logos, artwork, maps, trade dress, setting lore, characters, deities, locations, organizations, events, plots, and other Paizo Reserved Material are not included. Myth Meister is not affiliated with or endorsed by Paizo Inc. Expressly Designated Licensed Material: None.

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