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Cyclical Breathing when continuously using the same magic, it refers to the space between when one magic ends and the next one begins. The less overlap between the first and second magic, the less stress is placed upon the Magician. Magician who excelled in shortening the dead time between the two were known as "Adept at Cyclical Breathing".
Miyuki is mentioned to be "adept at cyclical breathing", and Tatsuya compares Masaki's talent as rivaling to that of Miyuki. Tatsuya mentions that Masaki's cyclical breathing is more like an innate talent.