Abandoned Armory

Huge construct, neutral

Armor Class 18 (natural armor)
Hit Points 253 (22d12 + 110)
Speed 20 ft.

20 (+5) 13 (+1) 20 (+5) 5 (-3) 10 (+0) 1 (-5)

Saving Throws Dex +6, Con +10
Damage Immunities poison, psychic, bludgeoning, piercing, and slashing from nonmagical weapons
Condition Immunities blinded, charmed, deafened, exhaustion, frightened, paralyzed, petrified, poisoned
Senses blindsight 60 ft. (blind beyond this radius), passive Perception 10
Challenge 13 (10,000 XP)


  • Leaden Weariness. Any creature that strikes an abandoned armory with a melee weapon or unarmed must succeed at a DC 18 Wisdom saving throw or be affected as per the slow spell for 1 minute. The target can repeat the saving throw at the end of each of its turns, ending the effect on itself on a success.
  • Magic Resistance. The abandoned armory has advantage on saving throws against spells and other magical effects.
  • Powerful Blows. An abandoned armory applies twice its Strength modifier and threatens a critical hit on a roll of 19-20 with its slam attacks.


  • Multiattack. The abandoned armory makes three attacks with its slam or two with its ballista.
  • Slam. Melee Weapon Attack: +10 to hit, reach 10 ft., one target. Hit: 24 (4d12 + 5) bludgeoning damage.
  • Ballista. Ranged Weapon Attack: +6 to hit, range 120/480 ft., one target. Hit: 33 (6d10 + 1) type damage.
  • Perimeter Defense (Recharge 5-6). The abandoned armory fires a barrage of energy in a 60-foot cone. Each creature in the area must make a DC 18 Dexterity saving throw, taking 28 (7d6) fire and 28 (7d6) lightning damage on a failed save or half as much on a successful one.


  • Spell Reflection. If the abandoned armory makes a successful saving throw against a spell, or a spell attack misses it, the abandoned armory can choose another creature (including the spellcaster) it can see within 30 feet of it. The spell targets the chosen creature instead of the abandoned armory. If the spell forced a saving throw, the chosen creature makes its own save. If the spell was an attack, the attack roll is rerolled against the chosen creature.


An abandoned armory is an animated mass of weapons and armor, both magic and mundane, as well as spell-imbued items of offensive utility. Moving with uncanny locomotion, these constructs scour battlefields seeking objects of war that once held special significance to previous owners who were slain in combat. Due to the faint psychic imprints of the slain combatants from which they collect these artifacts, abandoned armories make it their mission to reunite the items with their past owners or find new owners worthy of wielding their finds.

This process proves to be fatal, however, as the constant psychic echoes cause an abandoned armory to believe everyone is unworthy and slay them in hopes of finding a new suitable owner for that individual’s equipment. This behavior has led abandoned armories to become something to be feared on the battlefield as they tear through an area, slaying every combatant they encounter. An abandoned armory is roughly 15 feet wide, cresting up to 20 feet tall, and weighs about 15 tons.

Destructive Salvage. Abandoned armories are rare, as their creation requires an unlikely confluence of environmental conditions and historical circumstances, along with a fair bit of luck. These mounds of equipment, typically overgrown with vegetation and hidden by the passage of years, contain treasure troves of items that are prized by fortune hunters. The process for an abandoned armory’s collapse usually happens in one of two ways. The more common method is through the destruction of the construct.

This usually damages many of the constituent items and makes the process of salvaging this equipment tedious at best. On the other hand, abandoned armories naturally collapse and dissipate when the magic that fuels them is exhausted. This usually happens to “longer-lived” abandoned armories that consume the innate magical energies after countless battles. The energy required to activate an abandoned armory’s various abilities slowly saps these magical energies until the abandoned armory lacks enough energy to maintain its form.

Scavenger Symbiosis. Certain creatures have taken an interest in abandoned armories, almost to the extent of representing a symbiotic relationship. For example, scavenging tribes of goblins who forage at the edges of legendary battlefields have sometimes developed a near-religious awe of these constructs.

They regard the appearance of an abandoned armory both as a good omen and a prime opportunity to comb the destruction left by its passage for interesting new tools and trinkets. To attract an abandoned armory, the goblins erect crude fetishes at the edges of their territory, making offerings of assorted “magic” items in the hope of drawing the attention of the construct. The rare occasions when an abandoned armory does indeed appear are just as likely to result in the hopeful goblins being destroyed by a tide of unstoppable metal and magic as they are to fulfill the goblins’ greed for treasure.

Section 15: Copyright Notice

Ultimate Treasury (5E) © 2023, Legendary Games; Authors: Jason Nelson, Loren Sieg, Pedro Coelho, Matt Goodall, Linda Zayas-Palmer, Thurston Hillman, Jeff Ibach, and Alex Augunas

This is not the complete section 15 entry - see the full license for this page