Zanpakuto Control

Wielding a Zanpakuto is more than a simple matter of skill in swordsmanship. Since the swords themselves are alive, a Shinigami must obtain his or her sword's cooperation to truly maximize its performance. This can be done in a variety of ways, though it seems that the orthodox approach involves subjugating the sword; the Shinigami belonging to the Thirteen Divisions keep their swords sealed into