D20 SYSTEM✦ Normal

The Shattered Vein: Automaton Onslaught of the Crystalfall Mine

# Dungeon# Construct# Intrigue# Wilderness

Deep beneath the Spine of the World, the Crystalfall Mine once pulsed with life-giving luminescence. Now, its veins run with a cold, rhythmic clatter. The Gondian Engineers, desperate to save their failing surface city from magical blight, accelerated the extraction of arcane crystals using war-forged mining automatons. They bypassed the ancient overload protection chips—safety protocols carved by the deep-dwelling Moria for centuries. The automatons, their cores now resonating with unstable crystal energy, have gone berserk, smashing everything in their path. You have descended not to play hero, but to sift through the wreckage of two desperate ideals: progress at any cost, and the sanctity of ancient balance. The mine is a tomb of choices, and its heart holds a terrible power both factions would die to control—or destroy.

Chronicle Prelude

You emerge from a narrow, steam-vented tunnel into the Gondian Forward Camp, a precarious settlement of canvas tents and humming generators built into a massive cavern overlooking the upper mine shafts. The air smells of ozone, hot metal, and fear. Distant, rhythmic impacts echo from below, shaking loose dust from the stalactites. This is your only safe zone—a fragile bastion of industry against the mechanical horror below.

Environmental Traits

The entire Crystalfall Mine is on the verge of catastrophic failure. The berserk automatons, fueled by unstable crystals, are not just destroying the mine—they are causing a resonance cascade that threatens to collapse the entire Underdark region, triggering earthquakes on the surface. The players must navigate the chaos to reach the Primary Overload Core in the deepest sanctum and make an irreversible choice to save or doom both factions and the land itself.

Legendary Archetypes

Rayan

HP:45

STR:16

WIS: 12

CHA:11

Key Factions & Autonomous Nodes (6)

Chief Engineer Valya
A weary human woman in her late 40s, her once-pristine Gondian uniform stained with grease and dust. Her eyes are sharp but shadowed by profound exhaustion and the weight of impossible choices. She carries a master toolkit and a constant, nervous energy.
Stone-Speaker Gaelith
An ancient Moria with grey, stone-like skin that seems to have absorbed the minerals of the deep earth over centuries. Her eyes are solid, polished obsidian. She moves with a slow, deliberate grace, and the air around her feels heavy and still.
Junior Engineer Fenn
A young, terrified Gondian covered in dust and minor cuts. His eyes dart around constantly, and he clutches a broken data-slate to his chest. He represents the guilt and horror of those witnessing the direct consequences of the corps' decisions.
Moria War-Scout Kael
A fanatical Moria warrior clad in hardened chitin armor and wielding a spear tipped with a sharpened crystal shard. His grey skin is painted with ochre war-paint depicting cracked stones. He views all surface-worlders as defilers of the sacred deep.
Automaton Overseer
A massive, spider-legged construct of scarred iron and cracked Gondian plating. Its central chassis houses a corrupted, oversized Crystalfall crystal that pulses with erratic, violent light. It moves with jerky, relentless purpose, its many limbs ending in industrial tools repurposed as weapons.
Lingering Artisan Spirit
A faintly glowing, translucent Moria form clad in the ghostly outlines of fine crafting tools. Its expression is one of deep sorrow. It hovers near a small, natural crystal shrine, and the air around it is cool and still.

Chronicle Prelude

Environmental Traits

Legendary Archetypes

✦ Related Cases ✦

The Lost Workshop: Heart of a Raging Core

The Woven Edict