Moon Collar Creator Unknown Created Unknown Last use Purpose Moon Collars (or Moon Shackles), were employed by the Budapest Coven during Viktor's attempt to harness the Lycans as Immortal slave labor for the Vampires. They were created after the birth of the first Lycan, Lucian, and were used during the following two centuries, until the Vampires lost control of Castle Corvinus. After the Lycans took control of the castle, the Vampires no longer held Lycan slaves and had no use for the moon collars.