Publisher's blurb:

Chthonic Codex is about the dangerous world of fantasy academia, complete with drunken students, Devouring Idols, Initiation Rituals, crotchety Savants, and ah hostile underground environment.

Play a magic academy student, a teacher, a stranger visiting the Hypogea. Find out that, despite the dangerous and scary subterranean environment, humanity is always the real problem.

A complete campaign setting for Swords & Wizardry, Adventure Fantasy Game and other Old School games.

Dozens of new monsters and their role in the campaign setting.

New magic rules, mana-based system, completely new spell lists, spell research.

New magic schools: Fire Dervishes, Chimerists, Gatekeepers, Stargazers, Orthodox Necromancers, Artificers, Pharmacists, the Mysteric Chthonic Craft, and more.

New magic systems for all classes: join Mysteric Initiation Rituals! learn the hidden Laws of Reality!