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Seln Ardo - AI-generated fantasy Monster

Seln Ardo

Seln Ardo was once the annex's senior registrar, tasked with preserving a sealed record whose contents were meant to remain unknown. When the annex flooded, Seln Ardo refused to abandon the registry. The flood took the clerk, but the duty remained. Now Seln Ardo guards the records and seems to recognize people whose names appear in its ledgers, even if they have never visited the annex.

Monsters
Medium undead · CR 5 , suitable as a challenging solo encounter for four 5th-level characters, especially with hazardous terrain · Unique

Seln Ardo

A drowned records custodian whose supernatural authority over names turns the annex's paperwork and floodwater into weapons.
AC15
HP82/82
CR5 , suitable as a challenging solo encounter for four 5th-level characters, especially with hazardous terrain
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 15 · HP 82 · CR 5 , suitable as a challenging solo encounter for four 5th-level characters, especially with hazardous terrain

Seln Ardo

Medium undead (drowned custodian), lawful neutral
Armor Class15 (waterlogged coat and uncanny footwork)
Hit Points82 (11d8 + 33)
Speed
30 ft.,
Swim 30 ft.
STR
DEX
CON
INT
WIS
CHA
Saving ThrowsWisdomCharisma
SkillsInvestigationPerceptionPersuasionStealth
Damage Resistances
Cold,
Necrotic
Immunities
Poison damage,
Poisoned condition,
Disease
Weaknesses
Seln Ardo cannot use Archivist's Passage through solid barriers.
It is strongly motivated to protect the registry and can be distracted or bargained with.
Its supernatural restraint is made of paper and can be destroyed by attacks.
Senses
Darkvision 60 ft.,
Passive Perception 13
Languages
Common,
One language known by the person whose name Seln Ardo most recently borrowed
Challenge5 , suitable as a challenging solo encounter for four 5th-level characters, especially with hazardous terrain
Hit Dice11d8
Proficiency Bonus+3
Initiative+2
Amphibious. Seln Ardo can breathe air and water.
Archivist's Passage. Seln Ardo can move through water and through spaces occupied by paper, books, or loose shelving without treating those spaces as difficult terrain. It cannot move through solid walls or furniture that fully blocks a space.
Duty Unbroken. Seln Ardo has advantage on saving throws against being charmed or frightened while within 30 feet of a written record.

Actions

Quillknife. Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 8 () slashing damage plus 4 () necrotic damage. If the target is standing in water, it must succeed on a Strength saving throw or be pulled up to 10 feet toward Seln Ardo.
Strike from the Index (Recharge 5-6). Seln Ardo targets one creature it can see within 60 feet. The target must make a Wisdom saving throw. On a failure, it takes 18 () psychic damage and cannot willingly move farther than 30 feet from Seln Ardo until the end of its next turn, as its own name seems to vanish from memory. On a success, it takes half damage and suffers no movement restriction. A creature that has no name or is immune to being charmed automatically succeeds.
Flooded Aisle. Seln Ardo causes a 15-foot square of water it can see within 60 feet to surge. Each creature in the area standing in the water must succeed on a Strength saving throw or be knocked prone and pushed up to 10 feet. The surge also moves loose objects and toppled papers in the area.
Bind in Red Tape (Recharge 6). Seln Ardo chooses up to three creatures it can see within 30 feet. Each target must succeed on a Dexterity saving throw or be restrained by ribbons of soaked record paper. A restrained creature can use its action to make a Strength check, freeing itself on a success. The paper can also be destroyed: AC 12, 10 hit points, immunity to poison and psychic damage. The effect ends after 1 minute or when Seln Ardo is incapacitated.

Reactions

Slip Between Entries. When a creature Seln Ardo can see enters or leaves a space within 5 feet of it, Seln Ardo moves up to 10 feet without provoking opportunity attacks. It must end this movement on a walkway, platform, or in water.
Role
Controller and defensive guardian
Built for
5th-level party of four characters

Gear

  • Quillknife (Weapon, 5 gp)A narrow blade with a handle carved from a broken stamp. It is mundane and has no special properties beyond the attack listed in the statblock.
  • Annex key ring (Tool, 25 gp)A ring holding keys to the annex's cabinets and service doors. One key opens a locked iron drawer containing a clue to the quest.
  • The sealed registry (Treasure, Priceless to the quest, 50 gp as an object)A water-resistant ledger containing names, dates, and unexplained blank entries.

Notes for the game master

Seln Ardo is a custom monster for Dungeons & Dragons 5th Edition, balanced as a challenge 5 creature.
The names and effects of its supernatural abilities are custom features, not official spells.
The annex's waist-high water is difficult terrain for creatures without a swim speed. The raised stone platform and narrow walkways are not difficult terrain.
A creature can climb onto a toppled shelf or the raised platform using its movement, subject to the terrain and the DM's judgment.

Tactics

  1. Opening

    Seln Ardo begins among the toppled shelves, presenting itself as a tired records clerk. If the party approaches the raised platform or touches a sealed ledger, it uses Strike from the Index against the apparent leader.

  2. Mid-fight

    Use Bind in Red Tape to pin down a clustered group, then punish a trapped or isolated target with Quillknife. Keep moving between shelves and water lanes, forcing the party to spend movement reaching the platform.

  3. End of the fight

    When reduced below 20 hit points, Seln Ardo uses Flooded Aisle to disrupt pursuit, then retreats toward the raised platform or the nearest dark aisle. It fights to preserve the sealed registry, not to die for it.

  4. Retreat

    Seln Ardo bargains if offered a name, a written confession, or assurance that the registry will remain intact. If cornered and below 10 hit points, it attempts to escape through a narrow shelf aisle, abandoning its keys if necessary.

How it fights

Use the shelves to break line of sight and make the party approach through narrow paths.
Favor control effects over repeated attacks, giving characters time to interact with the environment.
Do not let Seln Ardo remain isolated on the platform if the party has ranged attackers; have it reposition with Slip Between Entries.
Have Seln Ardo speak politely during combat, addressing each target by name whenever it can.

Who it attacks first

A character carrying or reaching for the sealed registry
A character attempting to dry, burn, or destroy records
A mobile character moving freely between walkways
A character separated from allies in the water

Works well with

Toppled shelves give Seln Ardo cover and create lanes for Flooded Aisle to push enemies into.
Allies that can grapple or shove can hold enemies in the water while Seln Ardo uses its paper bindings.
An accomplice who can impersonate an official or produce forged records may delay the fight or distract Seln Ardo.

How to beat it

Dry ground reduces the usefulness of Flooded Aisle and Quillknife's pulling effect.
A creature that succeeds on its saving throw against Strike from the Index is not subject to its movement restriction.
Destroying the paper bindings frees restrained creatures without requiring a check.
Spreading out limits the number of creatures caught by Bind in Red Tape.

Ways to avoid a fight

The party can negotiate access by offering a written account of their purpose and agreeing not to alter the registry.
A character who correctly identifies Seln Ardo as the former senior registrar can prompt it to answer one question about the annex before it becomes suspicious.
The key ring can open cabinets containing evidence without requiring the party to cross the most dangerous water lanes.
The party can distract Seln Ardo by presenting an incorrectly filed record and asking it to resolve the discrepancy.

Ecology

A lean, meticulously dressed figure in a clerk's coat, its hem submerged and its sleeves dark with water. Its face resembles a damp sheet of parchment: features appear briefly when it speaks, then rearrange into the likeness of someone nearby. A ring of iron keys hangs from its belt, and thin strips of written paper trail from its fingers like pale tendons.

Behavior

Precise, courteous, and unnervingly procedural. Seln Ardo corrects people who misstate their names and asks intruders to sign a register before attacking. It avoids unnecessary violence, but treats damage to records as a grave offense.

How it lives

Seln Ardo does not eat or sleep. It is sustained by the records entrusted to its care and by the names written in them. It can persist for years in a flooded archive, repeating its duties until the collection is destroyed or its charge is fulfilled.

Lair

The half-flooded records annex known as the Registry Approach. Its narrow walkways, waist-high water, toppled shelves, and single raised stone platform are all familiar to Seln Ardo.

Habitat
Flooded archives, civic records halls, submerged courts, and abandoned bureaucratic buildings.

Signs that it is near

A dry, freshly stamped page lies atop a submerged desk.
Names written in the annex's ledgers bleed into the water as thin red threads.
Keys jingle from somewhere beneath a shelf, though no one is visible.
A calm voice asks visitors to state their names and business.

Tags

undead,
unique,
controller,
aquatic,
archive guardian

Lore

Seln Ardo was once the annex's senior registrar, tasked with preserving a sealed record whose contents were meant to remain unknown. When the annex flooded, Seln Ardo refused to abandon the registry. The flood took the clerk, but the duty remained. Now Seln Ardo guards the records and seems to recognize people whose names appear in its ledgers, even if they have never visited the annex.

What drives it

Preserve the sealed registry and ensure that every person named in it is correctly identified.

After the fight

When Seln Ardo is defeated, its borrowed face blurs and the water fills with drifting names. The records it protected remain legible only if someone retrieves them before the ink dissolves. A character who speaks Seln Ardo's full name aloud can calm its lingering spirit for a moment, allowing a final question or apology.

“When the annex flooded, Seln Ardo refused to abandon the registry.”
From its lore

Variants

A younger custodian with 55 hit points and no Bind in Red Tape can serve as a weaker guardian.
A version bound to a dry courthouse can replace Flooded Aisle with a paper-swarm effect that obscures sight and blocks corridors.

Hooks

Plot hooks

The sealed registry contains a name that has been deliberately erased from every other record in the city.
A character's name appears in the ledger beside a date that has not yet arrived.
Seln Ardo mistakes a party member for the person who ordered the annex sealed and demands an explanation.
The registry may prove that a respected official has been living under a false identity.

How to use it

Use the narrow walkways and toppled shelves to create difficult routes and broken lines of sight.
Keep most of the annex waist-deep in water, but leave the raised stone platform as a dry refuge and a meaningful tactical objective.
Let the party hear Seln Ardo correcting a name or stamping a document before they see it.
Make the sealed registry a clear objective so characters can negotiate, steal, or destroy it instead of simply fighting.

Treasure

The sealed registry, containing information central to The Name Beneath the Span.
A ring of iron keys worth 25 gp, including a key to a locked cabinet of evidence.
A waterproof case holding 2 potions of healing, placed on the raised stone platform.

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