Alicorn

HPDM slash, AU. When Narcissa asks Harry to take Draco into hiding in the past with the help of a cursed collar, strange things happen. Like slave bonds. And fractured tripartite universes. And more than one version of both Draco and Harry. Dark fic, involving slavery, some dub-con and Stockholm Syndrome, minor character death, and time travel, among others. COMPLETE.