Guardian Disk

Tiny construct, neutral

Armor Class 15 (natural armor)
Hit Points 35 (10d4 + 10)
Speed 10 ft., fly 40 ft. (hover)

17 (+3) 15 (+2) 12 (+1) 7 (–2) 12 (+1) 11 (+0)

Damage Vulnerabilities electricity
Damage Resistances piercing and slashing from nonmagical weapons that aren’t adamantine
Damage Immunities poison, psychic
Condition Immunities blinded, deafened, paralyzed, petrified, poisoned
Senses blindsight 60 ft. (blind beyond this radius); passive Perception 11
Languages understands Common, but can’t speak
Challenge 2 (450 XP)


  • Bleed. A creature other than a construct or undead looses 2d6 (7) hit points from bleeding at the start of its turn per Slice it has suffered. Magical healing or a DC 15 Wisdom (Medicine) check as an action stanches all bleeding wounds.
  • Constructed Nature. The guardian disk doesn’t require air, food, drink, or sleep.
  • False Appearance. While the guardian disk remains motionless, it is indistinguishable from a normal piece of recording media.


  • Slice. Melee Weapon Attack: +5 to hit, reach 5 ft., 1 target. Hit: 10 (2d6+3) slashing damage and the target is subject to the guardian disk’s Bleed ability, and the disk attaches itself to the target. If the target is Medium or smaller and the guardian scroll had advantage on its attack, the target is struck in the eyes and blinded. The target can regain its vision by making a successful DC 13 Constitution save as an action.


  • Dangerous Dodge. A guardian disk flies erratically and dangerously close to other creatures, using them as cover against attacks. When the disk adjacent to an enemy and is attacked by another creature, as a reaction it can dart in close to the adjacent enemy, gaining a +2 bonus to its Armor Class against one attack. If the attack hits, it deals half damage to the guardian disk and half damage to the adjacent creature.


Guardian disks are deceptive constructs created from enchanted crystal, metal, plastic, or other recording media, designed to protect the databanks, libraries, and sacred texts of magical practitioners.

When an intruder enters a proscribed area or touches a prohibited object without first speaking a password or otherwise signaling permission to enter, the guardian disk attacks like a gleaming polygon of circuit-engraved graphene darting and slashing with its razor-sharp edges.

Deadly Disk. At rest, guardian disks appear identical to any number of different types of magical or non-magical disks, data cards, or similar storage media. When a guardian disk becomes active, it rises in the air and wafts about with casual ease as it approaches its target while magically hardening its edges to the strength of steel. When it attacks, it races past its target, drawing its edges across any exposed flesh, leaving a long, deep, and painful slash that bleeds badly afterward. This is not the scroll’s only means of attack, however. It can also unleash flashes of light, sound, and raw data that can disorient a target.

Section 15: Copyright Notice

Mechanical Monsters (5E) © 2023, Legendary Games; Authors: Jason Nelson, Miguel Colon, Robert J. Grady, Nicholas Hite, Matt Kimmel, Michael Mifsud, James-Levi Cooke, Dan Dillon, Mike Myler, Ismael Alvarez, Jeff Lee, John Lynch.

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