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The Salt-Sealed Hierophant

Long before the cult broke the seals, the chamber's priest-wardens bound this guardian to preserve the dead in perfect silence. Its oath was to keep the sanctum unopened until the proper tides, rites, and successors arrived. The cult mistook its stillness for weakness. Now it treats all intruders as the same sin wearing different faces.

Monsters
Large undead · Hard to Deadly boss encounter for 4 level 6 characters · unique

The Salt-Sealed Hierophant

A drowned burial guardian awakened by cult excavation, defending the sealed sanctum with tidal necromancy, burial sigils, and the authority of a broken oath.
AC18
HP136/136
CRHard to Deadly boss encounter for 4 level 6 characters
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 18 · HP 136 · Hard to Deadly boss encounter for 4 level 6 characters

The Salt-Sealed Hierophant

Large undead (undead), lawful evil
Armor Class18 (barnacled funerary armor)
Hit Points136 (16d8 + 64)
Speed
30 ft.,
swim 30 ft.
STR
DEX
CON
INT
WIS
CHA
Saving ThrowsConstitutionWisdomCharisma
SkillsReligionPerceptionIntimidation
Damage Resistances
cold,
necrotic,
nonmagical bludgeoning, piercing, and slashing damage
Immunities
poison,
disease
Weaknesses
Radiant damage interrupts its regenerative tide and weakens its seal magic.
Consecrated ground or holy water suppresses its lair effects briefly.
Dry ground denies it many of its best control options.
If the sanctum seal is restored or the rightful rite is completed, it loses access to its legendary lair advantage.
Senses
darkvision 120 ft.,
blindsight 10 ft. while submerged,
passive Perception 13
Languages
Common,
Celestial,
one dead liturgical tongue of the tomb
ChallengeHard to Deadly boss encounter for 4 level 6 characters
Proficiency Bonus+3
Undead Resilience. The Hierophant has advantage on saving throws against being turned or frightened. While in water or standing on soaked stone, it regains 5 hit points at the start of its turn unless it took radiant damage since the end of its last turn.
Funerary Judgment. The Hierophant's weapon attacks deal an extra 4 () necrotic damage to creatures that are prone, grappled, or restrained.
Tideborne. The Hierophant can breathe only through old rites, not lungs. It ignores difficult terrain caused by shallow water, mud, or submerged debris.

Spells

Detect Magic (cantrip, divination). The Hierophant can cast detect magic at will, requiring no components.
Thaumaturgy (cantrip, transmutation). The Hierophant can cast thaumaturgy at will, requiring no components.
Command (level 1, enchantment). The Hierophant can cast command 3 times per day, requiring no material components.
Hold Person (level 2, enchantment). The Hierophant can cast hold person 2 times per day, requiring no material components.
Water Walk (level 3, transmutation). The Hierophant can cast water walk 1 time per day, but only on undead, corpses, or itself.

Actions

Scepter of the Drowned Rite. Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 12 () bludgeoning damage plus 9 () necrotic damage, and the target must succeed on a Strength saving throw or be pushed up to 10 feet and knocked prone if it is standing in water or on slick stone.
Press the Burial Deep. The Hierophant exudes a 20-foot-radius pulse of grave pressure centered on itself. Each enemy of the Hierophant in the area must make a Constitution saving throw. On a failure, a creature takes 13 () necrotic damage and cannot regain hit points until the start of the Hierophant's next turn. On a success, the creature takes half damage and suffers no other effect.
Seal of the Tomb Oath. The Hierophant targets one sealed door, stone slab, iron gate, or burial seal it can see within 60 feet. The target becomes locked by spectral funerary sigils until destroyed or dispelled. Creatures that try to open or force the target must first succeed on a Strength check or Dexterity check, and the first creature that fails takes 7 () force damage.

Reactions

Tidal Rebuff. When a creature the Hierophant can see hits it with a melee attack while standing in water or within 10 feet of a flooded edge, the attacker must make a Dexterity saving throw or take 7 () bludgeoning damage and be pushed 5 feet from the Hierophant as a recoil wave lashes out.

Legendary Actions

Brine Drift. The Hierophant moves up to its speed without provoking opportunity attacks. If it ends this movement in water, it can also cause rippling difficult terrain in a 10-foot line behind it until the start of its next turn.
Condemn the Oathbreaker. One creature the Hierophant can see within 30 feet must succeed on a Wisdom saving throw or hear the hierophant's funeral condemnation and have disadvantage on its next attack roll or saving throw before the end of its next turn.
Raise the Remains (costs 2 actions). A corpse, pile of bones, or submerged skeleton within 30 feet rises as a bone thrall for 1 minute or until destroyed. The thrall acts on the Hierophant's initiative and uses the skeleton stat block, except it has 1 hit point and deals extra necrotic damage on a hit.
Role
boss
Built for
6

Gear

  • Scepter of the Drowned Rite (weapon, 50 gp)A corroded ritual mace fused with a coralline scepter head. It serves as the hierophant's primary weapon and key to several warded locks.
  • Barnacled Funerary Armor (armor, 125 gp)Rusting ceremonial plates layered over preserved wrappings, inscribed with funerary vows and salt sigils.
  • Crown of Rusted Reliquary Chains (wondrous relic, 75 gp)A crown of chained reliquary fragments, keys, and prayer tokens that hums near sealed stone.

Feats

Burial Ward Resistance
Grave Pressure Aura
Tidebound Command
Sanctum Anchor

Notes for the game master

Undead nature. The Hierophant does not need to eat, drink, breathe, or sleep.
Grave Pressure. At the start of each creature's turn within 10 feet of the Hierophant, if that creature is in water or standing on damp stone, it must succeed on a DC 16 Strength saving throw or have its speed reduced by 10 feet until the start of its next turn.
Sanctum Anchor. While the Hierophant remains within its lair, it has advantage on saving throws against being turned, banished, or forcibly moved.
Bloodied trigger. The first time the Hierophant is reduced below half its hit points, spectral chains slam down from the ceiling, creating difficult terrain in a 20-foot radius around it until the end of the encounter.

Tactics

  1. Opening

    It rises from the flooded dais with a prayer of broken syllables, summoning grave-mist and trying to lock the most obvious exit. It immediately targets healers or relic-bearers, seeing them as grave robbers or oathbreakers.

  2. Mid-fight

    It uses Press the Burial Deep to suppress healing and control space, then punishes anyone isolated by water or prone with its scepter. If the battle turns against it, it spends its legendary actions to reposition, lock exits, and drag the fight toward flooded terrain.

  3. End of the fight

    When bloodied, it unleashes Seal of the Tomb Oath to trap intruders near the sanctum door, then fights defensively while the chamber fills with oppressive grave pressure. It would rather die beside the seal than let the dead be plundered.

  4. Retreat

    It does not flee in the mortal sense. If its sanctum seal remains intact, it fights to destruction. If a party proves it is here to restore the tomb, it may hesitate, speak in reverent fragments, and allow passage only after a proper vow or offering is made.

How it fights

Open with area control and seal exits.
Use the environment to force prone targets into water.
Focus on healers, torchbearers, and anyone carrying keys or relics.
Keep pressure on the party rather than pursuing far from the sanctum threshold.

Who it attacks first

Heal sources and support casters
Characters carrying relics, keys, or tools
Enemies isolated in water or near sealed doors

Works well with

Pairs well with cult remnant fanatics, flooded corridors, bone piles, and collapsing masonry.
Works as a second-phase guardian after a lesser drowned corpse or cult acolyte encounter.
Combines especially well with enemies that push, restrain, or create difficult terrain.

How to beat it

Radiant damage weakens its necrotic regeneration and breaks its composure.
Dry, elevated ground limits its water control and makes its push effects less deadly.
Dispel magic or similar effects can suppress its Seal of the Tomb Oath long enough to open routes or rescue trapped allies.
It is vulnerable to coordinated focus on its concentration-like warding moments, especially after using Press the Burial Deep.

Ways to avoid a fight

It can be calmed if the party performs a correct burial prayer, returns stolen relics, or swears to leave the dead undisturbed.
It may answer questions about the sanctum, the cult, or the crypt's original purpose in fragmented liturgy.
If presented with proper funerary tokens, it may allow passage or request that the cult leaders be destroyed first.

Ecology

The Salt-Sealed Hierophant is a tall, waterlogged corpse enthroned in ruined funerary armor layered over algae-stiff wrappings. Barnacles crust its pauldrons and ribs, a crown of rusted reliquary chains hangs from its skull, and a black veil of grave-mist leaks from every seam. Its face is half-mask, half-skeletal ruin, and seawater drips from hollow eye sockets like tears that never end. When it moves, bone charms clatter under the sound of distant surf.

Behavior

Ceremonial, cold, and relentlessly judgmental. It speaks as a priest still fulfilling a final rite, but the rite has been broken by death and cannot be completed cleanly. It condemns the cult in formal fragments, then applies ruthless logic to anyone who entered after them.

How it lives

The Salt-Sealed Hierophant is the echo of a high priest or tomb sentinel interred with a sacred tidal seal. In life, it guarded a flooded dynastic crypt against grave thieves and oathbreakers. In undeath, it has become an extension of the tomb itself, awakened by the cult's excavation and chained to the deepest chamber by old vows and newer desecration.

Lair

Its lair is the sanctum threshold, where the floor drops into a flooded chamber lined with ancestor niches and sealed stone ribs. The water level subtly rises during the battle, and the walls sweat brine when it invokes burial rites. Loose bones, prayer candles, and rusted chain links drift in slow circles around the central altar.

Habitat
Drowned crypt corridors, half-submerged stairwells, sealed altar rooms, and collapsing ossuaries. Best used in spaces with water, doors, vertical levels, and brittle stone that can be exploited by ward surges and cave-ins.

Signs that it is near

Salt crusts form strange prayer circles on the walls.
Candles gutter blue-green even without wind.
Drowned bones knit together in neat ceremonial piles.
A low chant can be heard from behind sealed stone, as if the crypt itself is praying.

Tags

undead,
guardian,
boss,
drowned,
crypt,
necromancy,
water,
religious horror,
mini-boss

Lore

Long before the cult broke the seals, the chamber's priest-wardens bound this guardian to preserve the dead in perfect silence. Its oath was to keep the sanctum unopened until the proper tides, rites, and successors arrived. The cult mistook its stillness for weakness. Now it treats all intruders as the same sin wearing different faces.

What drives it

To preserve the sanctum, punish desecration, and complete a broken burial rite even if it must drown the living to do so.

After the fight

If the hierophant is destroyed, the burial seal loosens and the deepest chamber can be entered without the ward surges that once punished the living. Its shattered reliquary chain crown and scepter are worth a modest sum as religious curios, but the true prize is the sanctum key or tidal seal hidden beneath its drowned altar. The crypt may remain hazardous, but the dead within are no longer ruled by oath and pressure.

“Its oath was to keep the sanctum unopened until the proper tides, rites, and successors arrived.”
From its lore

Variants

Mourning Warden Thale, a named version with stronger divine command and tragic dialogue.
The Drowned Vigil, a faceless sentinel that replaces speech with tolling bell noises and heavier bone summons.
Salt-Sealed Hierophant, a priestly version emphasizing spells and burial sigils.
A wraith-haunted variant that trades bone thralls for shadowy revenants and fear effects.

Hooks

Plot hooks

The adventurers guild wants the deeper chambers searched before the cult returns to finish the excavation.
A sealed sanctum contains a relic that can stop the flooding, but the guardian will not allow it to be taken lightly.
The guardian knows the name of the cult's hidden benefactor and may reveal it if the dead are honored.
The sanctum seal is failing, and if the guardian is destroyed carelessly the entire crypt may collapse or drown.

How to use it

Mini-boss for the crypt's deeper chambers
Guardian of the sealed sanctum or reliquary vault
Boss fight that escalates environmental hazards through flooding, mist, and door seals
Negotiation encounter if the party can restore the rite or offer burial honors

Treasure

The sanctum key or tidal seal needed to open the deeper tomb
A ceremonial scepter worth 50 gp
A reliquary chain crown worth 75 gp
A buried chest containing 2d4 healing potions, silver funerary coins, and one uncommon ritual item

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