Druid - Circle of Spirits

This druid subclass was inspired by the real life spiritual aspects of druids. Druids of the Circle of Spirits are focused on te spiritual and unearthly. They are less connected to the earthly realmsthan other druids. Mechanically you can assume a new ghostly form using your Wild Shape that grants you a flying speed, intangiblity, and invisibility. At later levels you gain extra damage on melee attacks and your ghostly form gains additional features including damage resistance and temporary hit points on a kill.

- from the publisher's blurb