Sounds

Sounds is a Magic that allows its caster to create music notes of various different properties, such as exploding or shielding ones.

Secondth
Sounds Secondth: Death Gong (サウンズ セコンズ 「デスゴング」, Saunzu Sekonzu 「Desugongu」): The Secondth of Sounds. It's a giant bell capable of incapacitating anyone who hears it. In one minute, it will ring out, covering an area 2km wide. The only way of stopping the bell is to take its caster's wand.