Safi and Iseult, the legendary Cahr Awen, must heal the final Origin Well. But first, they'll have to actually reach it—and time is not on their side. With ancient figures rising from the past, with the Raider King's armies gathering for war, and with the magic at the heart of everything dying too fast, all of the Witchlands is on the brink of collapse.
To succeed, Safi and Iseult will have to call on every favor owed and every ally they've ever made, from Prince Merik Nihar to the Bloodwitch Aeduan and beyond. Yet all who fight for the Cahr Awen will soon discover that Eridysi's Lament is not the prophecy they believed it was—and their journeys are only just beginning.