Breach Blast(バブルブロウ, Baburu Burou?, lit. Bubble Blow), also known as Sea Song, is a recurring ability in the series. It is the ability of the summon Bismarck, often dealing Water-elemental damage to all enemies.
Breach Blast is the signature ability of the primal Bismarck, which is used after his carapace is shattered. As he readies it, he begins circling the rocky island while a Blue Sanuwa and Green Sanuwa appear. If the two serpents are not slain before Bismarck finishes readying his skill, Breach Blast will instantly kill the entire party.