Eightfold Blessing of Amaterasu

Eightfold Blessings of Amaterasu on the Weight Stone under the Sunlit Watery Heavens (水天日光天照八野鎮石) is a mirror that Tamamo-no-Mae wears on her body. It is the temporarily released form of the Weight Stone of Tamamo (玉藻鎮石), a sacred regalia among sacred regalia, which was enshrined at after being brought from heaven by "Takehinateru no Mikoto." According to the descriptions of the, it was taken from Izumo at the order of the Imperial Court and then later enshrined at. It possibly later came to be known as the, the divine repository of , and it is thought to be the prototype of the To-Kusa no Kan-Dakara (十種神宝) of the , which holds the power to revitalize souls and life-force.

The mirror levitates around Caster in battle, which she uses it to hit enemies in close combat. Once its function as a Noble Phantasm is activated, she summons a circle of levitating surrounded by a number of glowing, charges the mirror with energy, and stands in the middle of the circle to draw in the energy. The energy drawn in allows her to use her abilities without the need to expend any prana for a limited time. It is normally a divine treasure of the land of the dead, that can even bring the deceased back to life, but the Servant form of Caster hasn't been granted the authority to use that much power. Otherwise, it could have been an EX rank Anti-World Noble Phantasm that has the range of covering a single country.