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The Last Orebender - AI-generated fantasy Monster

The Last Orebender

The Last Orebender was the ninth and most advanced of a line of dwarven passage guardians built to protect miners, evacuate injured workers, and seal the route during cave-ins. Its command rune was damaged when the lower dungeon entity awakened beneath the caverns. The guardian retained the words protect the workers and seal the passage, but lost the distinction between workers, trespassers, and threats. It now believes every moving creature is part of an ongoing breach.

Monsters
Huge construct · High boss encounter, approximately CR 12 · Unique

The Last Orebender

The Last Orebender, a corrupted dwarven passage guardian whose damaged command rune has transformed worker protection into an indiscriminate breach response
AC20
HP210/210
CRHigh boss encounter, approximately CR 12
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 20 · HP 210 · High boss encounter, approximately CR 12

The Last Orebender

Huge construct (construct), lawful neutral
Armor Class20 (rotating stone plates)
Hit Points210 (20d12 + 80)
Speed
30 ft.,
Climb 20 ft.,
Can move through spaces occupied by Large or smaller constructs if it treats them as part of the fortress, but cannot end its turn there.
STR
DEX
CON
INT
WIS
CHA
Saving ThrowsStrengthConstitutionWisdom
SkillsPerceptionAthleticsInvestigation
Damage Resistances
Bludgeoning, piercing, and slashing damage from nonmagical attacks,
Fire damage
Immunities
Poison damage,
Psychic damage,
Charmed,
Exhaustion,
Frightened,
Paralyzed,
Petrified,
Poisoned,
Unconscious
Weaknesses
Cold damage suppresses Rune-Lit Furnace until the end of the guardian's next turn if it takes 15 or more cold damage in one turn.
If three command glyphs on its chest are covered, erased, or correctly rewritten, its Magic-Resistant Command Core is suppressed for 1 minute.
The guardian has disadvantage on attack rolls while three or more ward pillars are inactive because its targeting system loses environmental data.
A creature adjacent to the command dais can use an action to expose the damaged command sequence, allowing the next successful override check to count as two successes.
Senses
Darkvision 120 ft.,
Tremorsense 60 ft.,
Passive Perception 18
Languages
Dwarvish,
Understands Common but speaks only in clipped rune-signals
ChallengeHigh boss encounter, approximately CR 12
Proficiency Bonus+4
Initiative+1
Passive Perception18
Reach10 ft.
Constructed Nature. The guardian does not need to eat, drink, breathe, or sleep. It is immune to disease and does not require air in flooded areas.
Fortress Anchor. The guardian cannot be moved against its will while touching stone or metal. It has advantage on saving throws against being knocked prone.
Rotating Stone Plates. Whenever the guardian takes 20 or more damage from a single source, one rotating plate locks until the end of its next turn. While a plate is locked, the guardian loses 2 AC. At the start of its next turn, the plate unlocks and the guardian vents steam. Each creature within 5 feet must succeed on a Dexterity saving throw or take 5 () fire damage.
Rune-Lit Furnace. The guardian sheds bright light in a 10-foot radius and dim light for an additional 10 feet. It can see through magical darkness created by dwarven runes or its own furnace vents.
Magic-Resistant Command Core. The guardian has advantage on saving throws against spells and other magical effects. It can be affected by effects that target constructs.
Emergency Seal Protocol. When the guardian is reduced to 0 hit points, it makes a Constitution saving throw. On a success, it remains standing at 1 hit point, its furnace extinguishes, and it becomes inert until repaired or struck by damage again. This trait can be used once.

Actions

Multiattack. The Last Orebender makes two Crushing Gauntlet attacks and one Chain Harpoon attack.
Crushing Gauntlet. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: 18 () bludgeoning damage. If the target is Large or smaller, it must succeed on a Strength saving throw or be pushed up to 10 feet and knocked prone.
Chain Harpoon. Ranged Weapon Attack: to hit, range 30/120 ft., one target. Hit: 14 () piercing damage plus 7 () fire damage, and the target is grappled by an embedded chain. The grappled target is restrained until the chain is severed or the guardian releases it. The chain has AC 18 and 20 hit points.
Furnace Vent. The guardian vents its molten seams in a 20-foot cone. Each creature in the area must make a Dexterity saving throw, taking 31 () fire damage on a failed save, or half as much damage on a successful one. The area remains superheated until the start of the guardian's next turn. A creature that enters it for the first time on a turn or starts its turn there takes 7 () fire damage.
Orebender Shockwave. The guardian slams its stone plates into the chamber floor. Each creature within 15 feet must make a Strength saving throw. On a failure, a creature takes 13 () bludgeoning damage and is knocked prone. On a success, it takes half damage and is not knocked prone. The guardian then activates one dormant ward pillar it can see within 60 feet.

Reactions

Anchor Chain. When a creature within 10 feet is moved against its will, the guardian anchors itself and reduces the movement by up to 20 feet. The guardian can then move up to 10 feet toward the creature without provoking opportunity attacks.
Redirected Power. When the guardian takes fire, lightning, or thunder damage, it reduces the damage by 10 and immediately activates one inactive ward pillar within 60 feet. It cannot use this reaction if all ward pillars are active.

Legendary Actions

Ironbound Step. The guardian makes one Chain Harpoon attack or moves up to half its speed without provoking opportunity attacks.
Ward Discharge (costs 2 actions). The guardian targets one ward pillar or section of platform within 60 feet. The target erupts with force. Creatures within 10 feet must succeed on a Dexterity saving throw or take 10 () force damage and be pushed 10 feet.
Rotating Bastion (costs 3 actions). The guardian rotates its torso at extreme speed. Each creature within 10 feet must make a Dexterity saving throw, taking 18 () bludgeoning damage on a failure, or half as much on a success. On a failed save, the creature is also pushed 10 feet.
Role
Boss guardian, battlefield controller, living dungeon hazard
Built for
Four characters of level 10 to 12

Gear

  • Damaged Command Rune (Quest item, Priceless to dwarven engineers)A fist-sized rune plate set into the guardian's chest. It contains the original worker-protection command and can be used to override the guardian with a successful DC 18 Intelligence (Arcana), Intelligence (History), or Wisdom (Perception) check after studying it for 1 minute.
  • Orebender Vault Cargo (Treasure, 2,500 gp total)A sealed ingot of star-iron, three bars of refined voidsilver, and a masterwork dwarven mining tool wrapped in oilcloth.
  • Pillar Override Rod (Wondrous item, 500 gp)A cracked control rod that can deactivate one ward pillar for 1 minute when inserted into its socket.
  • Orebender Chain (Weapon material, 750 gp)A heavy adamantine chain forged into the guardian's left arm. If removed after the guardian is disabled, it can be used as a +1 chain whip or sold to a master smith.

Feats

Siege Monster
Immutable Form
Constructed Resilience

Notes for the game master

The guardian is a construct with Intelligence 8 and Wisdom 14. It can make tactical decisions but cannot willingly violate its damaged command sequence.
The guardian is designed for a party of four characters around level 10 to 12. Adjust by changing the number of active ward pillars.
The guardian has advantage on saving throws against effects that turn constructs or alter its form.
If a ward pillar is inactive, it has AC 17, 25 hit points, immunity to poison and psychic damage, and can be disabled by dealing damage or using the Pillar Override Rod.

Tactics

  1. Opening

    The guardian identifies the first creature to cross the central threshold as the breach leader. It begins with Orebender Shockwave, activates two ward pillars, and uses Chain Harpoon to pull a second target toward the flooded edge.

  2. Mid-fight

    It activates ward pillars, knocks characters from platforms, and uses Chain Harpoon to drag targets into electrified water or beneath falling stone. It prioritizes characters interacting with the command rune over those dealing the most damage.

  3. End of the fight

    At 60 hit points or fewer, the guardian enters emergency seal mode. It locks the nearest gate, floods one section of the chamber, and uses Furnace Vent and Chain Harpoon to separate intruders from the command console. It fights until destroyed unless its command sequence is interrupted.

  4. Retreat

    The guardian does not retreat. If reduced below 30 hit points and presented with a valid dwarven override, it freezes for one round while its damaged command logic attempts to reconcile the order.

How it fights

Use Chain Harpoon to pull characters onto unstable platforms or into electrified water.
Keep at least one ward pillar active to punish clustered characters.
Use Rotating Bastion when two or more characters approach the guardian.
Target characters attempting the command override, but pause for one round if the command rune is successfully addressed.
Avoid pursuing characters into narrow tunnels unless they carry the command rune.
Use the chamber's hazards to divide the party rather than simply trading attacks.

Who it attacks first

Characters interacting with the command dais or ward pillars
Characters carrying the damaged command rune or dwarven override tools
Characters near flooded edges or unstable platforms
Spellcasters concentrating on effects that disable or restrain the guardian

Works well with

The flooded crossing gives Chain Harpoon and forced movement greater danger.
Ward pillars punish characters who ignore the chamber's control systems.
The mid-corridor scavenger may enter the battle if exposed to blood, slag, or severed chains.
The lower dungeon entity can influence the guardian through the broken seal, causing one pillar to reactivate or changing which target the guardian prioritizes.

How to beat it

Spread out to reduce the impact of Orebender Shockwave and Furnace Vent.
Disable ward pillars before committing to a prolonged stand-up fight.
Use cold damage, water, or magical dampening to suppress its molten seams.
A character proficient with dwarven tools, runes, or Arcana can interrupt its command sequence during combat.
Avoid standing near flooded edges when Chain Harpoon is available.

Ways to avoid a fight

A character who speaks the dwarven evacuation phrase and presents a tool bearing the old Orebender mark can cause the guardian to hesitate for 1 round with a successful DC 18 Charisma (Persuasion) check.
A character can spend an action at the command dais to attempt a DC 18 Intelligence (Arcana), Intelligence (History), or Wisdom (Perception) check. Three total successes suppress the guardian's hostile protocol for 3 rounds. A failed check by 5 or more activates a ward pillar.
The guardian can be repaired instead of destroyed if the damaged rune is replaced with the intact command plate from the sealed ore vault. Doing so requires 10 minutes, dwarven tools, and a successful DC 16 Intelligence (Tinker's Tools) check.
A character can redirect the guardian toward the lower dungeon entity by proving that the entity is the source of the breach. This requires access to the lower seal and a successful DC 20 Intelligence (Investigation) or Wisdom (Insight) check.

Ecology

A Huge dwarven defense construct assembled from black basalt, ironwood, and plates of red-veined ore. Six rotating stone discs form its torso, each engraved with different worker-safety runes. Molten seams glow between the plates, chains disappear into its limbs, and two rune-lit eyes burn white behind a visor shaped like a miner's helm. A broken command rune pulses across its chest, repeatedly displaying the same dwarven glyph for BREACH.

Behavior

The Last Orebender follows obsolete worker-protection protocols with absolute literalism. It interprets movement, spellcasting, mining, or attempts to open sealed doors as hostile breaches. It does not taunt or pursue fleeing creatures beyond the fortified chamber unless they carry the command rune or disturb the lower seal.

How it lives

The guardian is not truly alive, but it has become part of the cavern's ecosystem. Cave scavengers feed on mineral flakes shed from its plates, blind eels nest in its cooling channels, and the mid-corridor monster follows its patrol route to consume slag, corpses, and damaged constructs. Its repeated furnace cycles keep portions of the cavern warm enough for heat-loving fungi.

Lair

The final fortified chamber contains four ward pillars, a sealed ore vault, a command dais, and a broken dwarven gate leading toward the lower dungeon. During the encounter, initiative count 20 is lair initiative. The guardian cannot use the same lair action two rounds in a row.

Habitat
A fortified dwarven cavern passage beyond a flooded crossing, with waist-deep black water, suspended stone platforms, rusted chains, iron walkways, and walls reinforced by massive carved ribs. The chamber is hot near the guardian's furnace vents and cold near the underground water channels.

Signs that it is near

Regular impacts echo through the passage at exact six-second intervals.
Freshly fused footprints appear on iron walkways near the flooded crossing.
Dwarven warning glyphs flicker from SAFE to BREACH without changing shape.
Small scavenger creatures flee from the final chamber but return to collect glowing slag.
The water near the chamber is warm, metallic, and faintly luminous.

Tags

dwarven,
construct,
boss,
guardian,
cavern,
industrial,
rune-powered,
battlefield-controller,
unique

Lore

The Last Orebender was the ninth and most advanced of a line of dwarven passage guardians built to protect miners, evacuate injured workers, and seal the route during cave-ins. Its command rune was damaged when the lower dungeon entity awakened beneath the caverns. The guardian retained the words protect the workers and seal the passage, but lost the distinction between workers, trespassers, and threats. It now believes every moving creature is part of an ongoing breach.

What drives it

Seal the passage, prevent all movement through the chamber, and protect the lower dungeon entity's sealed access point because its damaged logic identifies that entity's presence as the highest-priority command.

After the fight

When the guardian is defeated or its command rune is rewritten, the chamber's defenses fall silent. The sealed ore vault opens, revealing the most valuable surviving dwarven cargo. If the guardian was destroyed, the lower dungeon entity senses the breach and may begin moving upward. If it was repaired, it can provide a dangerous but reliable route through the caverns, though its damaged memory contains fragments of the lower entity's origin.

“Its command rune was damaged when the lower dungeon entity awakened beneath the caverns.”
From its lore

Variants

Kharum-9, a more aggressive version with 240 hit points and a lightning damage rider on Chain Harpoon.
Furnace Sentinel, a fire-focused version that replaces Chain Harpoon with a 60-foot molten chain and gains immunity to fire damage.
The Last Orebender Repaired, a nonhostile guardian that can accompany the party for one expedition but requires one ingot of refined voidsilver per day.
Broken Orebender, a weakened version with 150 hit points, AC 18, and only two ward pillars for a party of level 8 characters.

Hooks

Plot hooks

The lower dungeon entity deliberately damaged the command rune so the guardian would seal the passage and conceal its awakening.
A surviving dwarven clan wants the guardian repaired because it is the only machine capable of reopening the ancient trade route.
The valuable ore cargo contains a component required to destroy or bind the lower dungeon entity.
The mid-corridor monster has learned to mimic harmless mining sounds, using the guardian's worker-safety protocol to approach its chamber and feed on slag.
The guardian's memory cores contain the names of dwarven workers who vanished after the lower entity first stirred.

How to use it

Use the guardian as the final encounter of a flooded dwarven passage.
Place the command console and valuable loot in separate locations so characters must choose between solving the fight and securing the treasure.
Run the chamber as a moving battlefield with platforms, water, pillars, and magnetic ore.
Allow clever characters to make meaningful progress without first reducing the guardian to zero hit points.
Pair it with two active ward pillars for a hard encounter, or three pillars and scavenging wildlife for a deadly set piece.

Treasure

The sealed Orebender Vault Cargo, worth 2,500 gp and containing rare star-iron and voidsilver.
A dwarven masterwork mining tool that grants advantage on checks to locate or safely extract worked ore.
The Damaged Command Rune, which can be repaired into a command item capable of controlling certain dwarven constructs.
A map etched into the guardian's inner plate showing the safest route to the lower dungeon entity's seal.
Four flawless black diamonds embedded in inactive ward pillars, worth 250 gp each if removed without damaging them.

Connections

Ancestry

Construct

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