D20 SYSTEM✦ Normal

The Ironfathom Confluence

# Dungeon# Magitech# Intrigue# Wilderness

Deep beneath the world, where the Phlegathon River's sluggish, toxic currents carve through blind stone, a colossal ruin stirs. The Ironfathom, a legendary Dwarven submersible construct, lies wedged in a collapsed cavern nexus. Its steering shafts, coupled to a reality-inverting mechanism built by a mad, long-dead mechanist, have been misaligned by seismic tremors. The resulting 'Inversion Pulse' warps physics in the surrounding caverns, creating zones of reversed gravity, transmuted matter, and temporal echoes. Two desperate factions race to claim or control the ruin, each seeing salvation in the chaos. You are mercenaries, explorers, or debt-fugitives hired to navigate the treacherous approach, understand the malfunction, and decide the fate of the Confluence.

Chronicle Prelude

The campaign begins in Gloomhaven Market, a ramshackle but bustling trading post built into a massive, bioluminescent fungal cavern overlooking the churning, metallic-tasting waters of the Phlegathon River. The air hums with the distant, rhythmic pounding of the Ironfathom's unstable core and the shouts of merchants, spies, and desperate faction agents. Your employer, a neutral information broker, has provided initial supplies and coordinates to the first staging area.

Environmental Traits

The Underdark river network is experiencing escalating, reality-distorting 'Inversion Waves' emanating from the trapped Ironfathom. These waves cause unpredictable environmental hazards: gravity wells, mineral transmutation, and psychic dissonance. The factions believe the Ironfathom's core, powered by the 'Inverted Coupling Shafts,' can either stabilize the region or be weaponized. The ultimate goal is to reach the submarine's central control nexus and make a decisive choice regarding the machine's operation.

Legendary Archetypes

Rayan

HP:45

STR:16

WIS: 12

CHA:11

Key Factions & Autonomous Nodes (8)

Grixlo Binder
A stout, scarred Duergar with a perpetual scowl, dressed in practical leathers and adorned with trophies from various Underdark factions. He runs a discreet information kiosk in the Gloomhaven Market, surrounded by maps and sealed scrolls.
Elveira Stoneheart
A weary Deep Gnome woman with dust permanently etched into the lines of her face. She wears mismatched but well-maintained armor and carries a heavy crossbow with the stock wrapped in clan tartan. Her eyes hold the weight of a leader who has seen too much.
Korvus the Unbound
A tall, gaunt Derro with wild, color-shifting hair and eyes that glow with a faint, unstable light. His robes are patched with tapestries depicting fractal patterns, and his movements are unsettlingly fluid.
Tink-Master Bragg
A disheveled Stonebound Duergar engineer, his clothes torn and stained with grease and blood. He is huddled behind a makeshift barricade near the Mercury Floodgates, nursing a wounded arm and looking desperately at the massive, corroded valves.
Scrivener Lyssa
A Derro woman with ink-stained fingers and a leather-bound journal clutched to her chest. She stands before a massive, colorful mural, muttering to herself as she writes. Her eyes dart suspiciously at any who approach.
Lucid Vessel Kai
A Githzerai psion, gaunt and bruised, suspended in a shimmering energy field within a makeshift prison cell in Layer 3. His expression is one of focused calm, a stark contrast to the chaos around him.
Sentinel Prime
A hovering, multifaceted construct of corroded bronze and glowing, fractured crystal. Its form is partially holographic, flickering between geometric shapes. The air around it hums with distorted energy and whispers of garbled code.
Hangover Echo
A shimmering, translucent impression of a tall human in mechanic's garb, surrounded by floating tools and schematics that dissolve into fractals. Its mouth moves, but the words arrive as a disjointed chorus in the viewer's mind, accompanied by flashes of impossible colors and gravitational sensations.

Chronicle Prelude

Environmental Traits

Legendary Archetypes

✦ Related Cases ✦

The Lost Workshop: Heart of a Raging Core

The Crystalline Scorpion Frenzy