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Marrow-Thaw Scree - AI-generated fantasy Hazard

Marrow-Thaw Scree

A slope of grey shale mixed with finely powdered bone fragments that reacts violently to the warmth of living creatures. When stepped upon, the necrotic residue flashes into a frigid, soul-chilling slide of debris.

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Hazard EntryEnvironmentalLevel4Simple

Marrow-Thaw Scree

4LevelUncommonRarityMountainEnvironment
EnvironmentalMagicalNecromancyNegative
Level4
|
HP50
|
AC21
|
TypeEnvironmental
|
ComplexitySimple
|
RarityUncommon

Defenses

AC21
Hard12
HP50
BT 25
Fort++14
Ref++8
Will+null
Immune
critical hits, object immunities, precision damage
Resist
negative (10)
Weak
positive (5)
EnvironmentalMagicalNecromancyNegative

Detection

PerDC 22
StlDC 22 (or DC 12 in areas with heavy fog)
InitNone

“From a distance, this looks like a typical mountain scree field, though it has a peculiar, chalky whiteness. Closer inspection reveals that many of the stones are actually calcified knuckles and rib fragments polished smooth by the elements.”

Standard Engagement

Trigger

A living creature enters the 15-foot-wide area of the scree slope.

Routine

None

Reset

The hazard resets after 1 hour as the mountain winds redistribute the necrotic dust and the stones settle back into their frozen state.

Necrotic Slide

The scree gives way in a rush of bone and shadow. Each creature on the slope takes 4d8+8 negative damage and must attempt a DC 21 Reflex save.

Reflex Save Results

Critical Success: The creature is unaffected. Success: The creature takes half damage and is knocked prone. Failure: The creature takes full damage, is knocked prone, and is buried in the shifting bone-gravel (immobilized and must succeed at a DC 20 Athletics check to Escape). Critical Failure: The creature takes double damage and is buried (immobilized and must succeed at a DC 20 Athletics check to Escape).

Chilled Marrow

While buried by the Marrow-Thaw Scree, the creature is Enfeebled 1 by the supernatural cold. This condition persists until they are no longer immobilized by the hazard.

Description

A slope of grey shale mixed with finely powdered bone fragments that reacts violently to the warmth of living creatures. When stepped upon, the necrotic residue flashes into a frigid, soul-chilling slide of debris.

Discovery

DC 22 Perception (trained) to notice the lack of lichens and the unnatural stillness of the rocks, or DC 20 Religion (trained) to recognize the lingering aura of a mass death event.

Archival Lore

“Legend holds that these slopes were formed during the collapse of a necromancer's flying fortress. The high-altitude winds have scoured the meat from the fallen, leaving only a hungry, freezing malice trapped in the limestone.”

Environment
Mountain
Theme
Necromantic
Creator
Natural result of a catastrophic necromantic fallout.
Purpose
A passive, deadly deterrent for those climbing the peaks of the Cursed Range.
Game System
Pathfinder 2E
Art Style
Gothic alpine horror; sharp, jagged white peaks under a bruised purple sky, with visible skeletal patterns etched into the falling rocks.
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