The Chess Piece of Oaths itself is an extremely powerful Sacred Relic. At the same time, it is also a symbol of the oath-sworn family, representing many ancient powers.
For instance, opening an arbitration barrier within the Hall of Oaths, which originally belonged to the oath-sworn family, means that no one except the holder of the Chess Piece of Oaths and the person being arbitrated can enter.
Only blood descendants of that family can be recognized as the master of the Chess Piece of Oaths. As a token for the oath-sworn family to exercise their ancient Authority, it is generally held by the current Family Head.
The Borgia family had wished to arrange a marriage with Shiayar, believed to be the last scion of the Winter Flower Family. Part of their calculation was to recover the Winter Flower Family's Chess Piece of Oaths that she carried, and thereby inherit a portion of their ancient Authority. Regrettably, they did not succeed.
