Barrier Burst (バリアバースト Baria Bāsuto) is a spell originally derived from Protection Powered, detonating the active barrier to counter a melee attack. It is a very useful spell for Nanoha, as it allows her to break a melee engagement and gain distance for her shooting and bombardment attacks. In appears in::StrikerS, it is also used to defend against Subaru in a mock battle training.