Reiryoku

Reiryoku (霊力, Spiritual Power) is a power aligned with the spiritual sensitivity and willpower of the user. It is used by Shinigami to provide power for their various feats and to effectively channel the powers of their Zanpakutō. It can also be used to cast Kidō, magic spells created by the Shinigami. Reiryoku can even be coalesced into a physical form and thrown or shot as a projectile, such as an Arrancar's Cero. As a display of potency, spiritual beings have the ability to incapacitate the opponent's movement and simultaneously frighten them, by means of dispersing Reiryoku into the air. The aforementioned ability is known as Reiatsu (霊圧, Spiritual Pressure), possessing power that could be literally felt within the atmosphere.

The Order of the Seijin use reiryoku in a different way than the Shinigami of the Gotei 13 or the Arrancar. While they too use it for using Kidō and their Zanpakutō, they also use it for Reinō (霊能, Spiritual Ability).