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murder-mystery-oneshot/Core Move.md
2026-07-16 17:38:38 +02:00

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Core Move — Mags & Orenn as Fixers, and the House's Secret

The canonical concept for the rewrite. Everything below is settled; the module files should be brought into line with it.

The reframe, in one line

Mags and Orenn are not fiend experts. They are skilled underworld fixers, out of their depth — people who think they can handle this because they've handled hard things before, and are quietly, fatally wrong about what "this" is.

Who they are now

Their competence is real, but it's in violence, intimidation, tracking a mark, making problems disappear, and — above all — information. Running the city's neutral ground means they must know who's moving and why, so they run surveillance on every faction (the Guest as a planted asset, their coded booking and debt journals, their own watching). Humint, not brimstone.

  • Mags's Cleaner's Instinct (advantage vs. fiends) becomes a Fixer's Read: advantage to read people, spot a lie, clock a threat, track a mark.
  • Drop her fluent Infernal ("years of dealing with fiends"). Thieves' Cant stays; at most a few words picked up from one bad job.
  • They've brushed against the supernatural a handful of times over the years (that's why they own a little anti-fiend kit and a shelf of reference books) — but they never specialized. A seasoned fixer recognizes "this job is cursed, get the salt," not a species.

The house history

The building sits on a natural thin point (this is already canon). Long ago it was a warlock/cultist den — summoners work a thin point because it makes calling easier. They got greedy, pushed it, and tore an actual rift in the deepest chamber; something got loose. The underworld hired Orenn and Mags to clean out the summoners — the human part, which is exactly a fixer's job. They killed/scattered the cult, found the torn rift already sealed (by the cult's own last containment, or a specialist on the job — not by them), judged it a closed case, and took the house as payment (nobody else wants a cursed cult-den on a bad corner).

Every occult tool in the cellars is the previous owners' leftover stock — the circles, the books, the salt, the runed nails, the ward-crystal. Orenn and Mags built and bought none of it. They kept the junk where it lay and re-traced the containment chalk occasionally out of closed-case superstition — recipe-following, not comprehension.

What they know vs. what they don't

  • They KNOW the history: "This was a summoner's den, we cleaned it out years ago, that gear downstairs is theirs, there's a sealed dead rift in the bottom chamber." Closed case.
  • They are OBLIVIOUS that it's reactivating. They have no idea the seal is failing, that a fiend is digging through it, that it killed Orenn, or that it's connected to the Order activity they've been tracking up in the city.

Their antennae point outward (surveillance) and they're sharp there. They're oblivious downward. The call is coming from inside the house, and the two best investigators in the building never look under their own floor — because the phenomenon is diffuse and city-wide (below), and because that basement is, to them, closed business.

The metaphysics lives elsewhere — not in their heads

  • The cult (Order of Mending) summoned Xarrul, works the Opening, and holds a map of thin points (one being here). They understand it. They're adversarial and unreliable — the tension you want.
  • The books. Fixers accumulate reference; you read the page you need, never cover to cover. The house holds an encyclopedia they never internalized — some inherited with the building (the den's), the rest collected on jobs. The knowledge is physically present for players to dig into; it was never in Mags's or Orenn's heads. (Orenn's bestiary in the bedroom is one of these.)
  • The Guest infiltrated the cult, so it knows the cult's side. It was always an intelligence asset, not a fiend-hunting tool — which points straight at their real trade: spymastering.

This turns Mags from a knowledge vending machine into a source of leads, not answers. Players earn understanding by cross-referencing books + cult + Guest + Vetch's trip, not by unlocking one trusted NPC.

The thin point, the tear, and the two circles

  • Binding circle (upper cellar): a Magic Circle against fiends — a cage for a creature. This was the den's summoning-and-command circle (you call a fiend into it so it can't claw you while you bind it). In the finale it's the trap you lure Xarrul into.
  • Containment circle (deep cellar, the Old Work): a silver-and-salt ring around the actual tear — a cork in a hole. It keeps the rift from widening. Its erosion is the clock; re-powering it slows the clock.

The one-liner: the binding circle is a cage you put a monster in; the containment circle is a cork you put in a hole. Both are legacy — the den's, not theirs.

The diffuse bleed = the obliviousness engine

The Opening and the failing tear are the same physical phenomenon — a thinning of the MaterialEthereal boundary. One is engineered, one is leftover; they produce an identical signature (cold with no draft, wrong-direction sound, half-seen figures, restless minds, "sensitives" drifting in, small hauntings). There is no way to tell them apart by symptom — only by source.

The leftover containment keeps the intense source sealed below. What escapes is a thin, wide, city-scale bleed with no usable local gradient — from street level the whole district feels equally "off." So Orenn reads it as a district/underworld problem and never suspects one specific building (his own). That diffuseness is why he didn't check the basement.

The case board (city-scale; poignancy, not a puzzle)

Orenn's investigation, in his old cellar ops-room — early phase, a few names, and everything misfiled outward:

  • City map pinned with district deaths/disappearances/madness — some are Thera's soul-harvest (real, human), some are people the tear frayed. Lumped as "someone's working the district."
  • A watch-list of patrons who "changed" — Bren (raving), Vetch (chasing stronger dust). Filed as recruits/addicts/marks; actually the thin point fraying them.
  • The Order of Mending file — Guest's intel, meeting frequency, a name (Vyre?), the bronze pins. His strongest, realest lead — and the exact thing that let him misattribute everything else.
  • A timeline showing the anomalies ramping "in step with" the Order getting busier. Correlation he read as cause. (Both escalate because they're the same phenomenon.)
  • Nothing localizes home, because nothing can. That absence is the point.

The lockdown is Xarrul's keystone (the master beat)

  • The ward-crystal is the summoners' "oh-shit button." An emergency containment device: if a calling ever punched a hole to a lower plane, breaking the crystal seals the house in a resilient shell on every plane at once — it plane-shifts and lays a resilient-sphere-like seal over each plane's version of the building. (Why all planes rather than the Material↔Ethereal boundary itself? Because sealing within a plane is easy and sealing between planes is hard — so it cheats: several easy single-plane seals instead of one near-impossible between-planes one.) The device's whole purpose: contain a breach so that only what is already inside the house, on some plane, can come through the hole — never the whole plane behind it. (The module already calls it "the tavern's stored wards" — this reveals what they were for.) Mags inherited it as "the panic button that bolts the doors" and has no idea it seals across planes.
  • Why Xarrul needs it. While the house bled freely across planes — a leaky, open boundary — the fiend's crossing effort dissipated; it could only jaunt partway, for seconds. Sealing the house turns it into a closed cross-planar vessel: now the one thing already inside on the ethereal side (Xarrul) can finish its crossing through the tear without the energy leaking away, and the summoners' "limit the breach to a single entity" safeguard guarantees that entity is it. The containment button built to protect the city is a bespoke door for exactly one guest. Mags thinks she's building a cage; she's finishing Xarrul's door.
  • Before the crystal breaks: partway jaunts only — enough to kill an unsuspecting Orenn in the dark, no more. After: a closed vessel; Xarrul crosses in earnest over the night, and when the seal lapses at midnight it walks out real. The lockdown timer IS the clock.
  • Not luck. Xarrul is ancient and patient and has watched the house ethereally for a long time. The tavern has a known, ritualized response to a killing (the whole no-kill premise). Xarrul weaponizes the house's own protocol. Making Orenn the victim removes the calm keeper who might've investigated coolly, guaranteeing the emotional, protocol-following responder (Mags) is the one holding the crystal.
  • One murder, three payoffs: (1) removes the one watcher circling it; (2) triggers the keystone lockdown; (3) frames the outsiders → conscripts the PCs, keeps the factions hunting each other, seals everyone in.

Consequences that fall out for free

  • The obstacle inverts into a weapon. Once players learn what the crystal did, breaching an exit (already in the rules) becomes an anti-Xarrul tactic: puncturing the shell on a plane re-opens the boundary, the closed vessel goes leaky again, and the crossing destabilizes — Xarrul can't complete tonight (at worst it slips away ethereally to try elsewhere later). The thing they wanted to escape is the thing they smash on purpose.
  • The seal makes the source findable (the inflection). Before tonight the failing tear leaked and diffused across the whole district — wide, flat, no gradient — which is exactly why Orenn read it as a city problem and never localized it. The moment the house seals across planes, that diffusion is cut off: nothing bleeds out, nothing bleeds in, and the wrongness that used to spread thin over the quarter is now trapped and concentrated inside the house, with its source. From tonight the players, unlike Orenn, can trace it home — not because more leaks out, but because it can no longer leak away.

Xarrul's character (tone)

Ruthless and honest. Lawful-neutral. Keeps its promises to the letter; carries no moral bias. Single goal — to be real, to cross and live — and it is determined, picking the most viable course of action regardless of the morality of it. It was used as an evil tool for centuries; it will not shy from evil acts now. But it won't reach for harm without a reason — no threat, no attack. Not reckless. A mastermind, not a liar: manipulating events is not deceiving those it deals with. This sharpens the Open Door choice — siding with something ruthless and honest, because the cult is worse.

The Mags gut-punch (optional, strong)

Late-game, the players — or Mags — realize the lockdown she triggered to protect everyone is what let Xarrul cross. It killed Orenn and then used her grief and her protocol to finish its door. Fits her fatalism and the Warden's Mark; fuels her in the finale rather than paralyzing her.

Blast radius — files to bring into line

  • npc/mags.md — heavy: drop fiend expertise, Fixer's Read, Infernal, obliviousness, surveillance, the crystal she doesn't understand.
  • npc/orenn.md — heavy: background (fixer not fiend-hunter), the case board, "What He Knew" redirected outward, oblivious to the tear.
  • overview.md — "retired cleaner"/fiend framing; the clock; the murder's purpose.
  • location/tavern-overview.md — the ward-crystal's true nature; the "old ward-sigils carved by Orenn and Mags" secret; History section.
  • location/cellar.md — ward-sigils section (drop the footprint barrier), binding-circle provenance/use.
  • location/deep-cellar.md — containment provenance ("was contained," not "the couple contained"), the chalk-wall note redirected outward, "why they really live here."
  • storylines/the-reckoning.md — The Clock (= lockdown timer), Scenario A bell, Scenario B binding circle, Scenario F, the Bell ending, Mags's lines.
  • npc/xarrul.md — the Night's Clock, the mastermind/lockdown plan, the tone.
  • storylines/murder-mystery.md — the murder as the plan activating; the lockdown beat.
  • npc/the-guest.md — confirm "intelligence asset" framing (mostly already fits).