Skip to content
CharGen Icon
CreatePricing
Black Ledger Auditor - AI-generated fantasy Monster

Black Ledger Auditor

Guildmasters in Old Harwick used to say that a balance sheet never lies, but the Black Ledger Hall proved that a balance sheet can kill. The hall's most feared auditor was said to know every smuggled crate, every altered contract, and every unpaid bribe in the Bracken Ledger. When the guild collapsed into corruption and silence, the auditor did not leave. It was sealed inside the records vault with the master ledger, and the books learned to remember hatred. Now the thing prowls the hall like a living audit, hunting thieves, debtors, and anyone who looks too closely at what the guild was really moving through the river town.

Monsters
Medium undead · Major · rare

Black Ledger Auditor

An undead guild auditor animated by stolen contracts and centuries of unpaid dues, lurking in Black Ledger Hall to catch thieves inside their own heist.
AC16
HP136/136
CRMajor
Init
STR
DEX
CON
INT
WIS
CHA
ConditionsNone

Combat

AC 16 · HP 136 · Major

Black Ledger Auditor

Medium undead (undead, shapechanger), lawful evil
Armor Class16
Hit Points136 (16d8 + 64)
Speed
walk 30 ft.,
climb 20 ft.
STR
DEX
CON
INT
WIS
CHA
Saving ThrowsWisdomCharismaIntelligence
SkillsInsightInvestigationPerceptionStealth
Damage Resistances
necrotic,
psychic,
bludgeoning, piercing, and slashing from nonmagical attacks
Immunities
poison,
exhaustion
Weaknesses
Radiant damage bypasses its Borrowed Authority temporary hit points.
If the Black Seal of the Hall is broken, it loses access to legendary actions until the end of the encounter.
It is vulnerable to social deception when confronted with a convincing, official-looking authority that it cannot immediately verify.
Senses
darkvision 120 ft.,
passive Perception 14
Languages
Common,
one additional language of the setting, usually the local trade cant
ChallengeMajor
Proficiency Bonus+4
Master of the Ledger. The auditor has advantage on Wisdom (Insight) and Intelligence (Investigation) checks made to detect forgery, lies about ownership, hidden compartments, or tampered records. It also knows when a creature within 60 feet carries a key, seal, or document stolen from the hall.
Paperthin Passage. The auditor can move through a space as narrow as 1 inch wide if it is filled with loose paper, hanging forms, or suspended ledgers, but it cannot end its turn there.
Red Ink Veil. While in dim light or darkness, the auditor can take the Hide action as a bonus action. It leaves behind a smear of red ink instead of clear footprints.
Borrowed Authority. If the auditor starts its turn within 10 feet of a desk, shelf, filing cabinet, or bookcase, it gains 10 temporary hit points as the room seems to lend it authority.

Spells

Innate Spellcasting (cantrip, enchantment and illusion). The auditor can innately cast the following spells, requiring no material components: at will: detect magic, disguise self, minor illusion; 3/day each: hold person, mirror image, silence; 1/day each: arcane lock, bestow curse, confusion.

Actions

Cudgel of Final Accounting. Melee Weapon Attack: to hit, reach 5 ft., one target. Hit: 14 () bludgeoning damage plus 9 () necrotic damage, and the target must succeed on a Wisdom saving throw or be marked by the auditor until the end of its next turn. A marked creature has disadvantage on Dexterity (Stealth) checks and cannot benefit from being invisible to the auditor.
Red Ink Hex. Ranged Spell Attack: to hit, range 60 ft., one target. Hit: 18 () psychic damage, and the target must succeed on a Intelligence saving throw or have its speed reduced by 10 feet until the end of its next turn as its thoughts fill with impossible columns, totals, and overdue debts.
Shredded Records. The auditor flings a burst of razor-sharp paper ledgers in a 15-foot cone. Each creature in that area must make a Dexterity saving throw, taking 21 () slashing damage on a failed save, or half as much damage on a successful one.

Reactions

Immediate Reassessment. When a creature the auditor can see within 30 feet draws a weapon, casts a spell, or picks a lock, the auditor can force that creature to make a Wisdom saving throw. On a failure, the creature is marked by red ink until the end of its next turn and cannot take the Hide action.

Legendary Actions

Clamp Down. The auditor moves up to half its speed without provoking opportunity attacks, passing through spaces filled with documents as though they were difficult terrain.
Repossession (costs 2 actions). One creature the auditor can see within 30 feet must succeed on a Charisma saving throw or have one held item, key, pouch, or document slide 20 feet toward the auditor.
Demand for Payment (costs 3 actions). The auditor unleashes a focused burst of red-ink force at one creature it can see within 60 feet. The target takes 13 () psychic damage, and if it is concentrating, it has disadvantage on the concentration check.
Role
Controller and vault guardian
Built for
6-8

Gear

  • Cudgel of Final Accounting (weapon, 40 gp)A heavy oak baton capped in iron and engraved with tally marks. It doubles as a symbol of office and an executioner's club.
  • Black Seal of the Hall (wondrous item, 200 gp)A brass seal used to mark warrants, forgery notices, and cursed debt notices. The seal is the creature's focus for many of its powers.
  • Tally Satchel (container, 25 gp)A belt pouch of contract scraps, key rubbings, wax tablets, and bribe notes. Useful as loot and clues after the fight.

Feats

Audit of the Living
Inkblind
Paperstorm Reserve
Seize the Accounts

Augmentations

Seal-warded chest vault that stores stolen keys, forged writs, and one precious contract.
Ink-sight lenses that read hidden text, invisible marks, and recent hand signatures.
Paperwing flensing sleeves that harden to blade-like edges when the auditor is threatened.

Notes for the game master

The auditor is intended as a CR 8 solo monster for a party around level 6 to 8.
Its battlefield power rises sharply in cramped rooms with desks, shelves, chutes, and half cover.
If used in a larger heist scene, pair it with mundane guards, clockwork clerks, or trapped archive corridors rather than another hard-hitting elite.
Marked targets are easy to track through smoke, darkness, and crowd cover, making stealthy intruders feel hunted.

Tactics

  1. Opening

    The auditor begins behind desks, ledgers, or a counting screen, using its authority and the cramped guildhall to isolate intruders. It marks the first visible thief and calls for the hall's clockwork clerks to close exits.

  2. Mid-fight

    It focuses Red Ink Hex on the most dangerous spellcaster or scout, then uses Cudgel of Final Accounting to punish anyone who closes in. It relies on Shredded Records to break concentration and to keep the party moving through the room.

  3. End of the fight

    When reduced below one-quarter hit points, the auditor attempts to bargain, blackmail, or flee through its hidden archive passage, taking any surviving ledgers or hostage papers with it.

  4. Retreat

    It retreats if two or more of its allies are destroyed, if its seal compartment is opened, or if the party produces the true master ledger. It prefers to survive with secrets intact rather than die for the room.

How it fights

Use the environment to force chokepoints and deny clean escapes.
Target rogues, bards, and infiltrators first, because they threaten its files and secrets.
Spend legendary actions to stay mobile and strip important items from key targets.
If invisible or hidden foes appear, rely on mark effects and area attacks rather than chasing blindly.

Who it attacks first

Thieves carrying the master ledger or key seals
Spellcasters who can break locks, wards, or concealment
Rogues and scouts who are opening routes or bypassing the hall's security
Anyone attempting to burn or destroy records

Works well with

Pairs well with locked vaults, false ledgers, alarm bells, and corridor ambushes.
Works especially well alongside guards who do not understand the hall's secret routes.
If the party is already juggling multiple heist objectives, the auditor can pressure them with time, noise, and evidence removal.

How to beat it

Expose or destroy the master ledger to break its authority and reduce its confidence.
Bright holy symbols, sanctifying ink, or effects that dispel illusion weaken its stealth and false paperwork tactics.
Characters who use forged paperwork, legitimate guild seals, or social deception can delay its first attack and split its attention.
Area control spells that force it out from behind desks reduce the value of its protected opening position.

Ways to avoid a fight

Can be bargained with using authentic guild writs, blackmail, or a more valuable secret than the one the party came for.
Will open a locked route or reveal the hiding place of a vault key if offered the true name of a corrupt guild officer.
Can be deceived temporarily by forged ledgers, false seals, or a well-staged accounting dispute.
May allow passage if the party can prove it is only after a specific target, not the entire hall.

Ecology

A tall, hollow-voiced humanoid wrapped in layered clerk robes of oilcloth and waxed canvas, with a brass mask stamped with a perpetual seal. Its fingers are tipped with ink-black quills, its ribs are visible through a body of paper-skin and ledger parchment, and a swarm of receipt slips constantly circles its shoulders like patient insects. Its chest bears a locked metal compartment that clicks whenever it speaks a sum aloud.

Behavior

Cold, meticulous, and deeply resentful of disorder. It speaks in clipped audit language, quotes fees and fines during combat, and never forgets a debt. It treats burglary as an accounting error that must be corrected with pain.

How it lives

Born from the resentment of a guild that built itself on hidden fees, extortionate contracts, and falsified tallies. When a hall like Black Ledger Hall accumulates enough secrets and debt, a single trusted auditor can become a supernatural enforcer after death, especially if one of the house seals is buried with it.

Lair

The sealed records vault beneath Black Ledger Hall, reachable only through a false bookcase, a hidden sluice, or the clerk's chute behind the counting room. Its lair is lined with iron filing cages, chained bundles of account books, and whispering contract ribbons. While in its lair, it can trigger concealed bell cords, collapse shelves, and flood rooms with loose paper that acts like a blinding storm.

Habitat
Treasury chambers, archive vaults, counting rooms, and the locked upper floors of a guild hall. It thrives in places full of filing cabinets, paperwork, narrow aisles, barred doors, and concealed pass-phrases. In Old Harwick, it is most dangerous inside the old guildhouse linked to the Bracken Ledger.

Signs that it is near

Fresh ink smell in rooms that have been closed for years
Ledger pages turning on their own when spoken sums are nearby
Tiny red stamps appearing on doorframes, hands, and locked chests
A soft counting voice echoing through walls after midnight

Tags

heist,
guildhall,
undead,
bureaucratic horror,
vault guardian,
urban fantasy

Lore

Guildmasters in Old Harwick used to say that a balance sheet never lies, but the Black Ledger Hall proved that a balance sheet can kill. The hall's most feared auditor was said to know every smuggled crate, every altered contract, and every unpaid bribe in the Bracken Ledger. When the guild collapsed into corruption and silence, the auditor did not leave. It was sealed inside the records vault with the master ledger, and the books learned to remember hatred. Now the thing prowls the hall like a living audit, hunting thieves, debtors, and anyone who looks too closely at what the guild was really moving through the river town.

What drives it

Recover every stolen secret, punish every unpaid debt, and ensure the Black Ledger Hall's crimes never become public unless it can control the story first.

After the fight

If the party seizes the black seal and the vault keys, the guildhall can be exposed as a criminal clearinghouse or turned into a legitimate stronghold. Survivors among the guild can become allies, informants, or desperate enemies depending on whether the characters reveal the old ledgers or burn them. The Bracken Ledger may also gain leverage over Old Harwick if the heist proves who was really paying the town's worst debts.

“The hall's most feared auditor was said to know every smuggled crate, every altered contract, and every unpaid bribe in the Bracken Ledger.”
From its lore

Variants

Junior Auditor, a CR 3 lesser construct of paper and brass used as a guard and messenger.
Senior Factor, a CR 11 elite version with two clerks and stronger command magic.
Archive Wight, a more violent variant that tears knowledge directly from living minds.

Hooks

Plot hooks

A rival faction hires the party to steal the master ledger from Black Ledger Hall before the auditor can destroy it.
A guild clerk in Old Harwick claims the auditor knows the location of a missing inheritance locked behind the heist vault.
The Black Ledger Hall has begun issuing impossible debt notices to people who never signed anything.
The Bracken Ledger needs an internal audit, and the only copy of the original books is in the haunted hall.

How to use it

Solo boss for a mid-level heist team
Secondary defender in a guildhall vault room
Social encounter escalator when negotiations fail
Chase obstacle through cramped offices, counting rooms, and archive corridors

Treasure

The Black Seal of the Hall, worth 200 gp to collectors or as proof of control over the guild vault.
A ciphered transfer book containing names of smugglers, bribe routes, and hidden payments in Old Harwick.
1d4 rare ink vials, each usable for forgery, ritual writing, or spell components.
A cache of stamped trade tokens worth 150 gp.
One personal secret from a prominent guild officer, written in the auditor's hand.

Connections

Ancestry

Undead

Media

0 images

No images yet.

Visual sheet

Turn Black Ledger Auditor into a sheet

A high-res, share-ready sheet you can post or print.