Gwyn hangs a white ribbon on a beam in the training area. She says that the Valkyrie considered their training complete if they could slice the ribbon in half with a sword. None of the trainees are yet able to accomplish that feat. Only Cassian succeeds. Later, Gwyn invites Nesta to attend the evening musical service that the priestesses hold. Nesta agrees and confesses how much she misses music: “And I…I think I might be glad Feyre did this for me. The drinking, the males—I don’t miss any of it. But the music…that I miss” (520).

At the service, Nesta sits entranced by the beautiful, ancient melodies. Gwyn’s voice is the best of all. As she listens, Nesta finds her mind drifting to another place. She is startled to find herself in the depths of the mountain called the Prison, where she sees the third item of the Dread Trove—the Harp. She informs Cassian, and he flies to tell Rhys what she’s discovered. Rhys agrees to lift the enchantments from around the place so that Nesta and Cassian can enter. He also sends Cassian away with the great sword that Nesta forged, just in case she needs a magical weapon.