Excalibur

This legendary blade possesses unmatched power, capable of granting users light-speed movement and enough strength to defeat multiple top-tier students simultaneously. Despite its immense strength, the weapon is notoriously difficult to wield due to its massive ego and exhausting list of demands. Though initially discovered by Kid and Black Star through a self-authored book, its comical, high-maintenance personality often drives partners away. While it can appear as a sophisticated, mustachioed gentleman, its true nature remains a chaotic, comedic force within the series.