During the Virus War, the Tower Administrator, Shurelia, and the Mother Virus Mir, were on a long war to decide the fate of the world. However, due to Mir's exceptional abilities, she was capable of reading every and each movement that Shurelia was planning through the Symphonic Power lines that were laid throughout the Tower, thus rendering all of her attacks and strategies useless. Shurelia initially considered completely shutting down the Tower to defeat Mir, but since this would have killed all of the Reyvateils, dropped the Wings of Horus in the Sea of Death and shut down the Musical Corridor, turning Sol Ciel in an uninhabitable place, this possibility was discarded. Then, she assigned a team of engineers to begin debugging the Tower in an attempt to trap Mir, which was also impossib