The Immortality Key is a book about the Elusinian mysteries, a trek taken by intellectuals to consume a psychedelic beverage. This beverage may have contained party favors like DMT, Ayahuasca, or urgot.
"The hosts mention Brian Muraresku's book 'The Immortality Key' as a discussion point about the Eleusinian Mysteries and the potential use of psychedelic substances in ancient rituals, including wine with DMT, Ayahuasca and urgot."