Longa Obscuritas

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Pages: 11

Author(s): Oscar Rios

Artist(s): (none)

Setting: Invictus, Britannia

Appears in: Bride of Halloween Horror

Campaign: (none)


You’re on the way to the home of your old friend, retired legionary Cael Rufus. He retired last year and was given a tract of land north of Viroconium in Britannia, a territory only recently being settled as it was never worth the trouble of cultivating before. He’s a good friend but one apparently with a problem: your invitation came with a message that he might want your help “looking into something while you’re here”. Hopefully it isn’t anything that would get in the way of the Samhain holiday....


Spoilers - Keepers Eyes Only

Players should not read any further.


 Spoiler Section (Highlight to Read)

The new land being settled, where Cael’s farm is located, was once the seat of an ancient Serpent Man kingdom. The Serpent Folk were in time defeated and sealed up in caves underground, but have always been there, waiting for a chance to return to the surface to exact revenge on man. Their opportunity arrived when Roman engineers digging wells broke into their caves; the Serpent Folk have now begun sneaking out at night to play pranks on the Roman settlers and, as that does not drive the settlers off, the Serpent Folk escalate their attacks on the settlers, with plans to kidnap human "breeding stock" from the settlers. The investigators must now help their friend Cael protect his farm against the Serpent Folk and defeat the monsters once and for all.


Player Handouts:

  • Information about the local farms (not presented as a handout, but the "The Farms" and "Military Preparedness" sections could be printed/copied and cut out for use as a handout)
  • Regol's Story (not presented as a handout, but could be printed/copied and cut out for use as a handout)
  • The Problems (not presented as a handout, but the list of pranks being played by the "sprites" could be printed/copied and cut out for use as a handout)

Locations: Ancient Roman Britannia, town of Viroconium


  • Vipers
  • Troublemakers
  • Degenerate Serpent Men
  • Degenerate Serpent Men Spell-Casters ("Sprites" or "Pixies")
  • Druid (friendly by default)

Tomes and Artifacts:

  • Serpent Folk ruins - not presented as artifacts/tomes in the traditional sense, but could be adapted as such by enterprising keepers:
    • Partially-buried remains of a headless statue
    • Remains of a stone tower and wall covered in weathered carvings in serpent language
    • Stone water fountain with artfully carved snake spouts
    • Thick 12' metal snake-head light post (fills area with pale blue light)
    • 20' stone monolith covered in silver-lined runes in serpent language

Campaigns / Scenarios: (none)


Subtitle: "Longa Obscuritas, or, The Long Dark: An Original Cthulhu Invictus Scenario"

Keeper Comments

Comments to Keepers about this scenario; Possibly how to run it successfully. Keep general DISCUSSION on the talk page.

Setting: Viroconium, in northern Roman Britannia; the scenario could probably be easily adapted to the Dark Ages as well, and should work equally well if set in some lonely corner of England, Ireland, Scotland, or Wales.

Special Notes: This scenario suffers from a few humorous typographical errors; these aren't bad enough to make the scenario unreadable, but might be a bit distracting. No maps are provided for handouts, but this scenario could probably have used them, and a creative keeper might produce some in advance.

Dependence on Halloween: Minimal - Samhain is presented as a rather generic festival (feasting, drinking, dancing, music, and story-telling), and pretty much any holiday could be substituted, though there seems little point in making such a substitution: no prior familiarity with or "buy-in" for Halloween is required to run this scenario.

Sequel Plot Hooks: None by default, though it's possible to seed some further serpent-folk adventures into the Serpent Men's caverns or ruins. Cael seems likely to be a source of support and further adventures if he survives, and Cael's trouble-making rival Bresal similarly seems likely to be a source of further adventures if Bresal survives and ends up on friendly terms with the PCs or Cael; the Druid Regol could also be a useful contact for the investigators if the scenario ends with the Druid on good terms with the PCs. This isolated frontier village seems like a promising source of future trouble.