Sword release , known as "劍發布" is the performance of the user acting upon summoning the final form and structure of the sword's base. This is usually used by the captains or lieutenants which normally helped them to function better in a mission or war/battles. It concerns the full mastery of both of that sword's owner and sword bond to be able to release effectively.
Sword release helps to give benefits, granting a more advantageous level to the user which overcomes his weakness during his time of casting. Such as giving him super speed and strength, that of the First Division Captain, Solid8722.