Starlight Breaker (スターライトブレイカー Sutāraito Bureikā) is, along with Divine Buster, a signature spell of Nanoha Takamachi. The spell seems to be one of, if not the, most powerful in Nanoha's arsenal. Although Nanoha introduces Starlight Breaker as a "variation of Divine Buster", its mechanics are quite different. To cast the spell, Nanoha condenses stray mana in the area into a large sphere, then strikes it with Raising Heart to release the energy as a powerful beam. This spell is most useful when cast towards the end of a battle between high-level mages, since the area will be saturated with excess energy from their previous attacks.