From publisher blurb:
On Quintessence the Primal Shaman usually comes from one of the wilder, uncollonized places in the world. They represent a marriage between druidic magics and the primal rage of the barbarian, using this innate ferocity to channel the power of nature itself.
This is a Barbarian subclass that is compatible with 5th edition Dungeons and Dragons that allows you to cast some druidic spells and enmeshes your ability to cast these spells with the Barbarian's natural ability to become a powerful beast in their own right.
This subclass also includes two brand new druid spells from within the world of Quintessence!