Tsubaki fights Masamune inside the Enchanted Sword, but is easily beaten. Masamune claims that Tsubaki's inheritance of their family's weapon forms led him to become evil, and is agonized by her pity of him. Just when Tsubaki's soul is about to be absorbed by Masamune, Black Star's voice reaches her, and she gains the will to defeat her brother, absorbing her very first soul in the process. Masamune's soul also grants Tsubaki the power to transform into the Enchanted Sword, though its power is too much for Black Star to handle.