Ahu-Nixta Mechanon

Medium construct, unaligned

Armor Class 14 (natural armor)
Hit Points 51 (6d8 + 24)
Speed 20 ft., climb 10 ft.

16 (+3) 12 (+1) 18 (+4) 5 (–3) 14 (+2) 3 (–4)

Damage Immunities poison, psychic
Condition Immunities charmed, exhaustion, frightened, paralyzed, petrified, poisoned
Senses darkvision 60 ft., passive Perception 10
Languages understands Deep Speech and Void Speech but has limited speech
Challenge 2 (450 XP)
Proficiency Bonus +2


  • Construct Nature. The mechanon doesn’t require air, food, drink, or sleep.
  • Critical Malfunction. A critical hit against the mechanon has a 20 percent chance of striking the casing of the construct’s soul chamber, stunning the mechanon until the end of its next turn.
  • Soul Reactivation. A mechanon reduced to 0 hp stops functioning, becoming inert. For the next hour, if a Small or larger creature that isn’t a Construct or Undead dies within 30 feet of a deactivated mechanon, a portion of the creature’s soul is absorbed by the mechanon, and the construct reactivates, regaining all its hp plus additional hp equal to the dead creature’s CR. If the mechanon remains inert for 1 hour, it is destroyed and can’t be reactivated.


  • Multiattack. The mechanon makes two Utility Arm attacks or one Slam attack and one Utility Arm attack.
  • Slam. Melee Weapon Attack: +5 to hit, reach 5 ft., one target. Hit: 10 (2d6 + 3) bludgeoning damage.
  • Utility Arm. The mechanon has one of the following attack options:
    • Grabbing Claw. Melee Weapon Attack: +5 to hit, reach 10 ft., one target. Hit: 8 (2d4 + 3) piercing damage. If the target is a creature, it is grappled by the mechanon (escape DC 13). Until the grapple ends, the creature is restrained, and the mechanon can’t use its Grabbing Claw on another target.
    • Sonic Disruptor. Ranged Spell Attack: +4 to hit, range 60 ft., one target. Hit: 9 (2d6 + 2) thunder damage. If the target is a creature, it must succeed on a DC 12 Constitution saving throw or be incapacitated until the end of its next turn.
    • Telekinetic Projector. The mechanon fires a ray at a target it can see within 60 feet. If the target is a creature, it must succeed on a DC 13 Strength saving throw or the mechanon moves it up to 30 feet in any direction. If the target is an object weighing 300 pounds or less that isn’t being worn or carried, it is moved up to 30 feet in any direction. The mechanon can use the projector to manipulate simple tools or open doors and containers.
    • Adapt Appendage. The mechanon swaps its Utility Arm with the Utility Arm of any other mechanon within 5 feet of it.
    • Repair (2/Day). The mechanon touches an ahu-nixta or a Construct. The target regains 11 (2d8 + 2) hp.


Mechanons are found in ahu-nixta communities, fortresses, and vessels across the planes of Midgard, serving as domestics.

More dangerous are the lost or abandoned mechanons in wasteland areas of Midgard, where they scavenge for parts to repair themselves and to outfit their bodies with various tools and weapons to survive the harsh environs.

A spherical automaton clanks into view on three mechanical legs, its odd appendages whirring and clicking. These clockwork constructs act as guards and mechanized attendants to the ahu-nixta.

Artificial Minions. Built to serve its masters in a variety of ways, a mechanon can be customized to perform different tasks, and each mechanon is designed to be interchangeable with surrounding mechanons. They have enough sentience to follow simple commands and instructions.

Soul Powered. A soul harvested from a living humanoid powers the glowing heart of a mechanon. The ahu?nixta initially developed the horrific process to transfer a soul into the construct, but the knowledge to do so has since spread. The gem heart continues to hunger for souls, drawing in new ones from the recently deceased to reactivate dormant mechanons.

Section 15: Copyright Notice

Tome of Beasts 3 © 2022 Open Design LLC; Authors: Eytan Bernstein, Celeste Conowitch, Benjamin L. Eastman, Robert Fairbanks, Scott Gable, Basheer Ghouse, Richard Green, Jeremy Hochhalter, Jeff Lee, Christopher Lockey, Sarah Madsen, Ben Mcfarland, Jonathan Miley, Kelly Pawlik, Sebastian Rombach, Chelsea Steverson, Brian Suskind, Mike Welham

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