Devil, Geerthtool

Family: Devils

Large fiend (devil), lawful evil

Armor Class 17 (natural armor)
Hit Points 113 (12d10+48 HD)
Speed 30 ft.

18 (+4) 16 (+3) 18 (+4) 16 (+3) 15 (+2) 13 (+1)

Damage Immunities fire, cold
Condition Immunities poisoned
Damage Resistances bludgeoning, piercing and slashing from non-magical weapons that aren’t silvered.
Senses darkvision 120 ft., true sight 120 ft., passive Perception 12
Languages Infernal, telepathy 120 ft.
Challenge 11 (7,200 XP)


  • Amorphous Limbs. The devil grows a new appendage once every 12-24 hours and drops off one as well. The appendages vary in length and nature, sometimes looking human, other times appearing as those of an animal including sea animals such as octopus’. The appendages are the devil’s main weapons in a fight and also its main defense. The devil can have up to 12 appendages at any given time, and fights with 4 of them, using the others for balance. Each appendage is capable of doing a lot of damage and taking damage (see Limb Defense below). Blows directed at the limb of the creature cause it no permanent damage. The limbs themselves are AC 21 to score a good hit as they are constantly moving, twisting and shifting, and are made from bits of bone and sinew, giving them unnatural toughness. 12 or more points of damage cuts the limb off, but it can re-grow the limb in 3 (1d6) rounds.
  • Brute. A successful melee attack by the geerthtool deals an extra die of damage. This is already figured into the action statistics, above.
  • Create Objects. Through its obsession with finishing a perfect chair, the geerthtool has developed a unique capacity to summon building material for said object. The geerthtool can summon up to 50 cubic feet of wood, a dozen or so wood working tools, 100 yards of silk or cotton and 100 lbs of cotton batting. After using this ability, the devil requires a long rest before using it again.
  • Limb Defense. Whenever the geerthtool takes 12 or more damage from a single blow, it can use its reaction to lose a limb instead. The loss of the limb does not cost any hit point loss. It just loses a ‘weapon,’ thus reducing its multiattack ability by 1 until the lost limb regrows. The limb grows back in 3 (1d6) rounds. It will not lose a balancing limb (it needs four for balance).
  • Summon Imps. The geerthtool can summon 6 (1d12) imps to do his bidding. The imps appear at a spot of the devil’s choosing within 30 feet of it. The ability can be used three times before the devil requires a long rest to use it again. Completing a long rest restores all expended uses of this ability.
  • Teleport without Error. geerthtool can cast teleport without error as a spell-like ability. This ability requires no components and can be used three times before the devil requires a long rest to use it again. Completing a long rest restores all expended uses of this ability.


  • Hideous howl (Recharge 6). The monstrous mouth and odd tubular construction in the geerthtool’s throat allows it to emit an unearthly howl or rage of hatred that shatters glass and ceramic and can cause damage. Anyone within a 100-foot cone in front of the devil suffers 10 (2d10) points damage. The howl also acts as a fear spell. A successful Dexterity save (DC 15) halves the damage and negates the fear effect. The DC is constitution-based.
  • Multiattack. The geerthtool makes four slam attacks with its limbs.
  • Slam. Melee Weapon Attack: +8 to hit, reach 10 ft., one target. Hit: 19 (3d10+4) bashing damage, plus 3 (1d6) necrotic damage.


The geerthtool is a hideous devil, one of only a few of this type known to exist. Its ugliness derives from its incomplete state of being. This devil is in the process of being created. It is stuck in the process and thinks of nothing more than it coming to rest in a final state. The dreams which created this creature are incomplete as if one awoke in the middle of the dream as a figure was forming in the mind. Thus, the devil is and shall always remain – a process. This grotesque aberration looks to be a pile of bones with many multi-jointed arms, legs, and other appendages topped by a massive angular skull much like that of a crocodile. Rotting flesh and tendrils of tendons hold it together and warp around numerous pulsating and globulous organs dripping ichor and slime wherever it moves.

The creature is constantly growing extra limbs or appendages and dropping those which have been around for a day or more. It leaves a trail of limbs and bones behind it. The rest of the creature, though unfinished, is static. This state has made this devil supremely malicious and evil. It cannot even conceive of what it should be so has little hope for creating or moving to a perfect state. and even worse, because its state is always changing with its number of legs and arms changing with time, it grates angrily at its fate all the time and has no moment of solace. To the ill of all those it encounters, it kills out of envy for others in a complete and finished state.

Targeting the Vulnerable. The creature cannot speak but communicates telepathically. It cannot read thoughts but understands what a person or creature intends in a general sense. However, the creature is unusually keen in perceiving and detecting true intent as revealed in body language. Some actions and intents are often telegraphed by people unwittingly. For example, fear is telegraphed by an increase in sweating, twitches on the face, and elevating eyebrows. Equally, aggression or the intent to act is likewise revealed. The demon uses this to its advantage and often focuses on those characters who are most vulnerable or fearful.

Seekers of Comfort. All these devils have a similar obsession. They would like a comfortable place to sit or lie. As one might guess, having so many appendages coming out of their bodies, the devil finds it difficult to find a place or sit or lie down, and walking is very uncomfortable. As a result, it often spends much of its energies attempting to make a perfect chair/bed/recliner to sit in. This obsession supersedes most other concerns and if an enterprising character can find a manner of engaging this creature and offering a plausible solution to its problem, the devil can be quite forgiving – until said object is created.

Section 15: Copyright Notice

5th Edition Monsters & Treasure of Airhde, 1st Printing, Copyright 2021, Troll Lord Games; Author Stephen Chenault & Jason Vey

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