From the Kickstarter:
Beyond the kingdom of Aruanda, there is an untamed land. It is a place where witches walk, where goblins cavort, where the borders between the realms of mortal and fey grow thin. For some, it is a place of unspeakable wonder; for others, only madness and death lie within its trackless depths.
It is the Runewild, and it is both beautiful and cruel.
The Runewild is a dark fairy-tale sandbox setting for use with the 5th Edition of the world’s most popular roleplaying game. Designed for character levels 1 through 10, it provides locations, encounters, and NPCs to support a campaign lasting months or years, or to be adapted into other campaigns. The book includes:
A history of the Runewild and its surrounding settlements.
100 detailed encounter areas for player characters to explore.
New optional rules for exploring and resting
Advice for running a sandbox campaign
A new feat: Fey-Touched
13 unique magic items (like witch embers and the staff of clarity and confusion)
32 new monsters (including clockwork dwarves, fey lions, giant forest sloths, and the terrifyingly beautiful Golden Bodach).
Detailed descriptions of the histories, motivations, and weaknesses of the witches of the Runewild, including the Whitebone Sisters; Missus Switch, the swine hag; Korthsuva, the Witch of Hours; and the hag-queen Griselda, Mother of Ogres.
Dozens of random tables designed to help GMs make the Runewild campaign their own.
The campaign is up and running now. It's set to go for another 28 days.