The most recent Hymmnos created before the events of Ar tonelico: Melody of Elemia with the aim of keeping Mir sealed inside the Crescent Chronicle, as it acts as the "Key" that keeps its sealing functions active. It was created as a collaboration of sorts between the second most powerful Reyvateil in the Second Era, Lune, and the Tower Administrator, Shurelia. Lune provided the feelings of pity and sympathy she felt for Mir, while Shurelia made use of them to create the perfect song that would send Mir to sleep. Effect Key: Seal. Effect: Lullaby.