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Codex Alchemica


Codex Alchemica

A Complete Alchemy System for Call of Cthulhu Seventh Edition

“The sages of old! They held in their bosoms the elements of profundity and truth. Having compounded and partaken of the medicines prepared in the nine furnaces, they were endowed with power.”

Since it emerged in ancient Egypt and China 2,300 years ago, scholars have pursued the potential of Alchemy. It is an Art that combines opposites and channels natural philosophy, chemistry, astrology, mysticism and magic into a single cohesive discipline. Although its methods have changed over the centuries, the goal has always remained the same: transmutation.

The Codex Alchemica provides the Keeper with a suite of new tools to adapt and incorporate alchemists, their compounds and tomes into Call of Cthulhu investigations working within the existing Seventh Edition framework of magic. The Codex also provides a wealth of world building and plot inspirations. It serves as a robust resource, and also a jumping off point into further research into this deep, endlessly fascinating topic.

Inside this 110-page Codex you will find:

  • A review of Alchemical history, theory and practice.
  • Tables listing Alchemical methods and equipment 
  • Introducing complete game mechanics expanding the Call of Cthulhu magic system to include Alchemy.
  • Introducing the new Alchemy Investigator Skill
  • Examination of the cryptic language and illustrations of alchemy texts
  • 38 Formulas for alchemical products and medicines.
  • 31 Profiles of historic and legendary Alchemists
  • 26 Tomes of alchemical lore.
  • A New Scenario illustrating an alchemy centric investigation.
  • 2 Alchemical Symbol indexes
  • 2 Alchemical Lexicons
  • 14 Page circa 1920 Laboratory Equipment Catalog. A reproduction suitable to use as a player prop for aspiring Investigator alchemists.
  • Dark Ages alchemical equipment examples.
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Reviews (1)
Discussions (2)
Customer avatar
Matan B June 03, 2024 5:55 am UTC
are the Arcaheus of Water supposed to have game effect or are they just components for other formulas?
Customer avatar
Peter C June 03, 2024 10:25 pm UTC
Hello, Matan.

Although the alleged properties/domains of the various "refined waters" is attested to in several alchemical works, how they were to be used was implied vaguely at best. Because of this, I decided to leave their application up to the Keeper. I could easily see how each might be used as the required basis of, or to enhance other workings, compounds and spells. I hope you have enjoyed the codex. Thanks.
Customer avatar
Matan B June 04, 2024 7:18 am UTC
Ok, I understand. I wanted to add alchemy to my games soon because we are going to play Cthulhu dark ages, and a player of mine wanted to be a witch like character, so this resource is perfect for me and my group. I’ll be sure to leave a review after we used the material in game.
Customer avatar
Apostol Apostolov A May 11, 2024 7:05 pm UTC
POD when?
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File Last Updated:
May 12, 2024
This title was added to our catalog on May 11, 2024.