Glory of Ten Powers

By forging the Truth-Seeking Ball with the help of the Adorned Branch of Hōrai technique, Seireitou can further manipulate them to craft together two powerful swords, one katana and one wakizashi, from the same material. These blades are noticeably darkened in coloration, reflecting the blackness of the Truth-Seeking Ball's original state, which are highly compressed variations of the latter, carrying incredibly density and strength when used in both offensive and defensive situations. According to Seireitou, this is when "yin" and "yang" are brought to their greatest state of synergy.

Trivia

 * The Glory of Ten Powers (十神力, Shíshénlì) is a legendary sword in chinese folklore, said to have been forged by a husband and wife that belonged to the ancient Bon traditions. It is said that the love between these two were so strong, that the blade itself reflected upon it and manifested a spirit that served as its embodiment, granting the sword magical abilities that protected its wielder. This aspect was taken and instead used to represent the words Madara Uchiha spoke regarding Yin and Yang working together to bring the universe into balance, which produced, in this case, a pair of two swords.