Werewolves guard against mages raiding their caerns for quintessence but no one can stop us from raiding Werewolf books for story ideas! Adam and Terry talk Umbra, Umbra Rev and W20 Umbra from Chaos Stones to the Kami.

Axis Mundi - A big book of spirits for Mage and Werewolf

Umbra: The Velvet Shadow - First Werewolf Umbra book

Umbra (Revised) - Revised edition Werewolf Umbra book

W20 Umbra: The Velvet Shadow - W20 Werewolf Umbra book

Umbra Revised on Werewolf the Podcast

Umbra high-level overview

Spirit high-level overview