The Brassroot Conspiracy
The Brassroot Conspiracy
Read aloud
The River Lumen has begun flowing backward each night, and Rivetmeadow's boilers are failing one by one. Mayor Brasswell begs you to follow the river into the enchanted forest, find what is stealing its magic, and return before the settlement's life-saving pumps fall silent. Something beneath the roots is already waking.
Run the session
Cheat sheet
Objectives
- 1Trace the backward-flowing river to the Brassroot Engine.
- 2Identify the engineer behind the siphoning and uncover the full cost of the engine.
- 3Protect Rivetmeadow while the investigation continues.
- 4Decide the fate of the Brassroot Engine.
The clock
The party has three nights before Rivetmeadow's emergency water pumps fail. Each major delay advances the crisis: after the first delay, village machinery becomes unreliable; after the second, awakened trees attack roads and homes; after the third, the Brassroot Engine begins draining vitality from the settlement itself.
Scenes
- 0:00The Night the River Climbed
- 0:45Tracks Against the Current
- 1:45The Price of Pressure
- 2:45The Engineer's Door
- 4:00The Woman Who Restarted the Roots
- 5:00The Heart Beneath the Forest
Cast
- Mayor Elian Brasswellquestgiver
- Mara Vennantagonist
- Ilyra Mossglasswildcard
- Pell Ruskwitness
The hook
Set the scene
Rain taps against the tin roof of the Copper Kettle while the village's great boiler coughs below the floorboards. Every lantern dims at once. Outside, the River Lumen rises over its banks, then begins sliding uphill toward the forest as if pulled by an invisible chain. Mayor Elian Brasswell arrives carrying a cracked pressure gauge and asks the characters to investigate before Rivetmeadow's emergency pumps fail.
How Mayor Elian Brasswell asks
Mayor Elian Brasswell approaches the characters in the Copper Kettle after the village boiler fails.
She offers a partial advance, access to Rivetmeadow's workshops, and authority to commandeer a pump cart or local guide. If questioned about Mara Venn, she admits Mara has been missing from the village for three nights but insists that accusing her without proof could trigger a riot.
Rumours
Scenes
about 6.5 hours0:00
45 min
socialThe table is here
1. The Night the River Climbed
The Copper Kettle tavern and Rivetmeadow's failing pump station
The characters receive the mission, hear conflicting accounts from witnesses, and learn that Rivetmeadow's pumps will fail within a few nights unless the river's magic is restored or replaced.
NextThe party chooses which clues to pursue first: the riverbank, Mara's workshop, or the abandoned ferry road.
0:45
60 min
exploration
2. Tracks Against the Current
A moonlit ford beneath luminous willows
The party examines the reversed current, discovers traces of blue magic and brass filings, and faces the first violent manifestations of the disturbed river.
The Reversed FordNextThe evidence points toward a hidden maintenance route beneath the old ferry, while survivors report that Rivetmeadow's west pump is under attack.
1:45
60 min
skill
3. The Price of Pressure
Rivetmeadow's boiler yard, clinic, and flooded east street
The characters return or race back to Rivetmeadow to protect the settlement, choose which infrastructure to save, and learn that Mara's emergency pumps are keeping the clinic alive.
NextAfter the crisis, the party finds Mara's coded route map or captures a courier carrying supplies to the hidden engine.
2:45
75 min
social
4. The Engineer's Door
A subterranean brass gatehouse beneath the oldest forest grove
The party reaches the buried gatehouse and must pass the engine's wardens through combat, persuasion, deception, or proof that the machine is destabilizing.
The Rootbound GatehouseNextBeyond the gate, Ilyra Mossglass appears and demands that the party state whether they intend to save the village, the forest, or both.
4:00
60 min
social
5. The Woman Who Restarted the Roots
The Brassroot Engine's control chamber
The characters meet Mara, learn the full consequences of the engine, and decide whether to help her finish the emergency pumping cycle, convince her to stop, or seize control of the machine.
NextMara's choice or refusal triggers the final confrontation with Thornwake and exposes the source crystal at the heart of the engine.
5:00
90 min
combat
6. The Heart Beneath the Forest
A living underground grotto wrapped around the engine's pulsing core
The party confronts Thornwake, negotiates a restoration pact, sabotages the engine, or fights for control of the Brassroot Heart while the river and machinery reach a dangerous equilibrium.
The Brassroot HeartNextThe chosen resolution determines whether the river returns, Rivetmeadow survives unchanged, or the region enters a new and uncertain era.
Behind it
What people believe
The River Lumen is flowing backward at night, draining the grasslands and causing the small steampunk villages along its banks to lose power and clean water.
Rivetmeadow's mayor hires the characters to investigate the river, discover who is siphoning its magic, protect the settlement, and decide what to do with the ancient Brassroot Engine hidden beneath the forest. The apparent culprit is engineer Mara Venn, who claims she activated the machine to power life-saving pumps, while the forest's guardian, Thornwake, is trying to reclaim the stolen magic.
Background
The River Lumen winds through an enchanted forest before spilling into patchwork grasslands where small brass-and-wood villages rely on steam pumps, waterwheels, and alchemical boilers.
Beneath the oldest grove lies the Brassroot Engine, an ancient machine grown from metal roots and living wood. It was built to circulate magical vitality through the river and forest, but its original makers vanished after binding a guardian spirit into its workings. For generations, the engine slept. Now the river flows backward after sunset, grasslands are turning gray, village boilers sputter, and awakened trees lash out at travelers. The crisis began when engineer Mara Venn secretly restarted the engine to power emergency pumps that keep her village's wells from collapsing. Each night, the engine draws more magic from the River Lumen, while the forest guardian, Thornwake, hunts the stolen power and anyone who carries it.
The stakes
If the characters succeed, Rivetmeadow survives and the River Lumen can be restored or responsibly redirected.
If they delay, the village's life-saving pumps fail, the grasslands wither, and Thornwake's rage spreads through the forest. After the third major delay, the engine begins draining life from settlements directly, making every later resolution more destructive.
Encounters
3The Reversed Ford
combat
A shallow forest ford surrounded by luminous reeds, half-submerged gears, slick stones, and exposed tree roots. The water flows uphill in violent pulses after sunset.
Foes
Lumenback Eels
Brassroot Strikers
ComplicationThe river reverses in sudden pulses, sweeping loose machinery, roots, and glowing stones downstream toward the characters. The party can fight, cross carefully, or use the flow to reveal hidden tracks.
ScalingFor a smaller or less experienced party, use two Lumenback Eels and one Brassroot Striker. For a larger or more experienced party, add an awakened alder and increase the river's hazardous surges.
The Rootbound Gatehouse
social
A buried gatehouse of brass doors, living roots, pressure pipes, and catwalks above a dark maintenance shaft. Control levers can redirect steam, seal doors, or expose the engine's inner passages.
Foes
Brassroot Engine Wardens
Steam-Mantle Hounds
ComplicationThe engine's guards are not wholly loyal. They can be defeated, persuaded, or shown evidence that Mara's calculations are causing permanent damage. If combat begins, ruptured pipes fill the chamber with scalding vapor.
ScalingFor an easier version, use two Wardens with unstable armor and one hound. For a harder version, use four Wardens, two hounds, and a pressure valve hazard that changes the battlefield each round.
The Brassroot Heart
combat
A vast underground grotto where the Brassroot Engine grows around a pool of suspended riverwater. Brass roots pulse with stolen blue light, while living trees break through the ceiling and walls.
Foes
Thornwake, Guardian of the Lumen
Awakened Ironwood Limbs
ComplicationThornwake is enraged but not mindless. Attacking it causes the chamber's roots to constrict and drains magic from the nearest living creature. Characters who present evidence of the siphoning or offer a credible restoration plan can turn the encounter into a negotiation.
ScalingFor a smaller party, Thornwake begins wounded and the ironwood limbs remain dormant unless attacked. For a larger or more experienced party, Thornwake can split its attention between several characters and summon new roots during the confrontation.
Cast
4Mayor Elian Brasswell
Questgiverquestgiver
WantsQuestgiver and acting mayor of Rivetmeadow. She wants to save the settlement, but fears that exposing the truth about Mara Venn will split the village during its crisis.
“If the Lumen dies, Rivetmeadow dies with it. I need people who can walk into that forest and come back with answers.”
Mara Venn
antagonist
WantsA brilliant, morally conflicted engineer who restarted the Brassroot Engine to power life-saving pumps. She knows the machine is damaging the river, but believes shutting it down immediately will kill vulnerable villagers.
“I did not steal the river's magic for profit. I bought three more nights for every child breathing through a pump-fed respirator.”
Ilyra Mossglass
wildcard
WantsA secretive forest intermediary who speaks for Thornwake and the oldest trees. She wants the stolen magic returned, but may accept a pact that preserves both the forest and Rivetmeadow.
“The roots remember every hand that wounded them. Tell me, travelers, did you come to mend the wound or merely choose which creature bleeds?”
Pell Rusk
witness
WantsA tavern keeper and eyewitness who has collected contradictory rumors from traders, villagers, and frightened woodsmen.
“At midnight, the river climbed the bank like a snake trying to crawl back into the hills. Then the boiler bells rang without anyone touching them.”
How it ends
Rewards
Items
Lumen Source Crystal, usable as a magical power cell or restored to the River Lumen
Brassroot Heart-Key, allowing limited access to ancient nature-machine sites
Mossglass Pact-Seal, granting safe passage through the enchanted forest if a pact is negotiated
On a win
The characters restore a sustainable flow between the River Lumen, the Brassroot Engine, the forest, and Rivetmeadow.
The exact result depends on their final choice: they may negotiate a pact between Mara and Thornwake, sabotage the engine while releasing its stored magic, defeat Thornwake and claim the engine, side with Mara and keep the pumps running at a long-term cost, or return the source crystal to the forest and accept a difficult rebuilding period for the village.
What it leaves open
If it fails
- The characters fail to protect Rivetmeadow before the next major pressure release.
- Rivetmeadow's pumps stop, causing illness, panic, and a mass evacuation. The settlement survives only as a scattered refugee camp until the characters or future heroes restore the water system.
- The characters delay too long or destroy the engine without releasing its stored magic safely.
- The River Lumen permanently changes course, leaving portions of the grasslands barren and awakening hostile forest growth throughout the region.
- The characters side with Mara without repairing the engine's circulation system.
- Mara's emergency pumps continue operating, but the engine becomes unstable and begins draining vitality from the surrounding villages instead of only the river.
- The characters attack Thornwake after refusing every attempt at negotiation.
- Thornwake claims the Brassroot Heart and marks the characters as enemies of the forest, making future travel through the region dangerous and closing off several peaceful alliances.
Complications (d6)
- 1A backward surge lifts a section of riverbank and deposits it across the party's route, forcing them to cross unstable mud while fragments of enchanted machinery spark beneath the soil.
- 2A village boiler explodes in the distance, sending frightened workers toward the party for help while a local official demands that the characters abandon their investigation.
- 3An awakened alder tree mistakes one character for a Brassroot Engine operator and marks them with glowing sap that attracts Thornwake's attention.
- 4The party discovers a trapped forest spirit sealed inside a brass pressure canister. Freeing it grants a clue but causes nearby machinery to malfunction.
- 5Mara's emergency pumps begin to fail early. The characters must choose whether to spend time repairing them or continue toward the engine.
- 6A group of desperate villagers follows the party into the forest, potentially becoming hostages, witnesses, or allies when the engine guards appear.
Media
0 imagesNo images yet.
Turn The Brassroot Conspiracy into a sheet
A high-res, share-ready sheet you can post or print.
