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Vault Warden - AI-generated fantasy Monster

Vault Warden

The Vault Wardens are the elite gatekeepers of the Deep Elf civilization. While common guards watch the walls, Wardens watch the thresholds. It is said that when a Warden stands in a doorway, the mountain itself acknowledges their right to refuse passage.

Monsters
Large humanoid · CR 12 · Rare

Vault Warden

A master of spatial control and martial leadership from the depths of the Vaults.
AC20
HP178/178
CR12
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 20 · HP 178 · CR 12

Vault Warden

Large humanoid (deep elf subspecies), lawful neutral
Armor Class20 (Full Plate, Shield)
Hit Points178 (17d10 + 85)
Speed
30 ft.
STR
DEX
CON
INT
WIS
CHA
Saving ThrowsSTRCONWIS
SkillsAthleticsIntimidationPerception
Damage Resistances
Bludgeoning, Piercing, and Slashing from nonmagical attacks
Senses
Darkvision 120 ft.,
Passive Perception 17
Languages
Common,
Elvish,
Undercommon
Challenge12
Proficiency Bonus+4
Magic Resonance. While the Warden is wearing their plate mail, they have advantage on saving throws against spells and other magical effects.
Aura of Authority. Allies within 30 feet of the Warden that can hear them deal an extra force damage on weapon attacks.
Lockdown Expert. The Warden can cast the Arcane Lock spell at will (no components required). Doors locked this way can be opened freely by the Warden and their allies.

Actions

Multiattack. The Warden makes three attacks with its Heavy Flail or two attacks with its Heavy Flail and uses Recall.
Heavy Flail. Melee Weapon Attack: to hit, reach 10 ft., one target. Hit: 14 () bludgeoning damage plus 4 () force damage. If the target is a creature, it must succeed on a Strength saving throw or be knocked prone.
Recall. The Warden magically teleports one ally it can see within 60 feet to an unoccupied space within 5 feet of the Warden.
Seal the Vault (Recharge 5-6). The Warden slams their shield into the ground. All doors, gates, and portcullises within 100 feet slam shut and are magically locked as if by the Arcane Lock spell for 1 minute.

Reactions

Sentinel Shield. When a creature the Warden can see attacks a target other than the Warden within 5 feet, the Warden can use their reaction to impose disadvantage on the attack roll.

Legendary Actions

Commanding Shout. One ally within 30 feet can use its reaction to make one weapon attack.
Shield Bash. Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 10 () bludgeoning damage. If the target is a creature, it must succeed on a Strength saving throw or be pushed up to 10 feet away.
Warden's Step (costs 2 actions). The Warden moves up to their speed without provoking opportunity attacks.
Role
Tank / Battlefield Controller
Built for
Level 10 to 12

Gear

  • Resonating Plate (Armor, 5000 gp)Magic armor that hums when near ley lines.
  • Z-Mark Shield (Shield, 2500 gp)A heavy tower shield that grants resistance to force damage while held.
  • Vault Flail (Weapon, 1500 gp)A heavy flail that ignores half cover and three-quarters cover.

Feats

Sentinel
Heavy Armor Master

Notes for the game master

The Warden's primary goal is to trap the party in a room with them and their guards.
Recall should be used to pull back fragile Deep Elf Mages or reposition high-damage strikers.
Use Seal the Vault immediately if the party tries to retreat through a door.

Tactics

  1. Opening

    The Warden starts by using Seal the Vault to prevent the party from escaping, then uses Recall to bring in Deep Elf guards.

  2. Mid-fight

    They use their 10ft reach with the flail to keep enemies at bay while allies use the Aura of Authority to burn down the squishiest PC.

  3. End of the fight

    If heavily wounded, the Warden positions themselves in a bottleneck (like a 5ft wide door) and takes the Dodge action while letting their legendary actions provide the offense.

  4. Retreat

    The Warden never retreats. They are bound to the location. If they fall, they explode in a small burst of magical energy, sealing the nearest door permanently.

How it fights

Keep the party bunched together for AoE spells from Deep Elf allies.
Use Shield Bash to knock threats into hazards or away from fallen comrades.
Focus attacks on the target that looks like they can unlock the sealed doors (the Rogue or the Wizard).

Who it attacks first

Rogues (highest threat to locks)
Wizards (threat to the magical structure)
Clerics (sustaining the party)

Works well with

Deep Elf Annihilators
Deep Elf High Mages
Dancing Weapons (Hall of Blades context)

How to beat it

Dispel Magic (to unlock doors)
Teleportation (Misty Step) to bypass the lockdown
Forced movement that pushes the Warden away from the threshold.

Ways to avoid a fight

The Warden may stand down if presented with a legitimate pass signed by the Deep Elf Council.
They can be bribed with rare metallurgical components for their armor.

Ecology

An imposing warrior encased in thick, silvered plate armor etched with glowing cerulean runes. The helmet has a narrow horizontal slit, and their heavy tower shield is emblazoned with a jagged black 'Z' rune. They wield a massive three-headed flail that thrums with magical energy.

Behavior

Methodical and authoritative. They do not seek glory, only the absolute integrity of the corridors they guard. They communicate in short, barked commands that echo with supernatural weight.

How it lives

As high-ranking members of the Deep Elf military, Vault Wardens are chosen for their unwavering discipline. They undergo rituals to bind their lifeforce to the dungeon's architecture, allowing them to manipulate the structure itself.

Lair

Outer Transit corridors, specifically areas with multiple iron gates and choke points.

Habitat
Underground Fortresses, Magical Vaults, The Hall of Blades.

Signs that it is near

Massive iron doors that seem to have no handles
Echoes of rhythmic metallic clanking
The smell of cold ozone and incense
Symbols of the rune Z etched into every stone block

Tags

Deep Elf,
Guardian,
Warden

Lore

The Vault Wardens are the elite gatekeepers of the Deep Elf civilization. While common guards watch the walls, Wardens watch the thresholds. It is said that when a Warden stands in a doorway, the mountain itself acknowledges their right to refuse passage.

What drives it

To ensure no intruder reaches the Hall of Blades or the inner sanctums of Zot.

After the fight

Upon the Warden's death, the cerulean runes on their armor fade, and the doors they locked with Seal the Vault remain magically stuck for 24 hours unless dispelled.

“While common guards watch the walls, Wardens watch the thresholds.”
From its lore

Variants

Hall Warden: Swaps the flail for a Dancing Blade.
Zot Guardian: CR 15, adds breath weapon (Ancient Force).

Hooks

Plot hooks

The party is trapped in the Outer Transit and must defeat the Warden to find the release lever.
The 'Z' mark on the Warden's shield is a clue to the location of the Orb of Zot.

How to use it

Final boss of a 'Vault' level.
A recurring hunter that seals doors ahead of the party to funnel them into traps.

Treasure

Enchanted Plate Armor
Key to the Hall of Blades
2d6 large sapphires (500gp each)

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