ToZ - Wind Armatus Artes

Tenkyoujutsu (天響術 - "Seraph Spells")
Higher rank seraph spells are available if the "Charge Cast" (チャージキャスト) Battle Act is equipped. At the time a lower ranked arte is about to be cast, the player has the option to press the to delay the spell and begin charging the next tier spell if it has been learned, and the time spent chanting the previous spell goes towards the chant time for the next.