Occult Secrets of the Underworld (5e)

Softcover.
Over 13 new classes compatible with 5th Edition and the Underworld Races & Classes core book.
Mysterious Occult Traditions of the Underworld!
The untold vastness of the realms below beckons, and for the first time, we unearth the mysterious occult traditions of the Underworld. Surface-dwellers can finally lay their eyes upon the concepts of the Red River that binds all, attain amber enlightenment and transcend the bounds of the flesh with unique and potent magitech. Psychic poisons, mesmerizing spores and the damned of Hel await your command!