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The Obsidian Vault of Thornewick

Atmosphere A suffocating aura of shifting shadows and cold, unnatural silence pervades the space. Location Type Ancient Ritual Chamber

Investigate the underground chamber to uncover its purpose before the wards unravel entirely.

Clues
  • Half-burned ritual scrolls with disturbing symbols
  • A fragment of a blackened, quartz-like stone etched with strange carvings
  • An eldritch sigil faintly visible under a spectral sheen on the floor
Dangers
  • Unseen magical wards triggering hallucinations
  • A trapped spirit fiercely protective of the chamber’s secret
Secrets
  • The chamber is a gateway linked to an ancient, forgotten deity enduring beneath the estate
  • The wards are powered by a fragmented piece of a cosmic entity’s essence
  • The estate’s original owner was a cultist attempting to fuse reality with the mythos
Description

Hidden beneath a crumbling estate, the vault’s walls pulse with faint, arcane glyphs, and a sinister glow leaks from cracks in the obsidian—eerily echoing distant whispers.

Hook

Investigate the underground chamber to uncover its purpose before the wards unravel entirely.

GM Notes

- Emphasize the disorienting, unnatural atmosphere and whispering voices
- Use san loss cues when characters examine the glyphs or touch the obsidian surfaces
- Consider the chamber as a potential site for an unspeakable ritual or cosmic event

Created with Town Scryer for Call of Cthulhu 7th Edition

by bananatron