The Elixir of Kosomodes is a level-1, city-themed weird fantasy adventure inspired by the classic 1950s sci-fi thriller Invasion of the Body Snatchers. It is fully compatible with Dungeon Crawl Classics Role-Playing Game ruleset.

The adventure is designed to be inserted into any fantasy city setting with little or no adaptation and works equally well as one-shot adventure or as a segue between major episodes in an ongoing campaign.