This feeling of swelling was not unfamiliar to Angel.
In the past, when he was preparing to break through a barrier, his Magical Core would produce this swelling sensation, a harbinger of imminent advancement.
The appearance of this sensation now meant... he could prepare to advance?
He had already reached the pinnacle of an Apprentice, and according to his original plan, he had thought it would take a long time before this feeling of Magical Core expansion would manifest. Could it be that he now had hope for advancement just after learning the Spell Technique of witchcraft today?
Angel could have attempted to break through the great barrier right now, but neither the time nor the place was ideal, and the barrier he faced this time was different from before, a breakthrough that could alter the course of a wizard's life.
