“J-John?!” The police officers shouted in surprise.
The way John had been sent flying earlier had put the words “instant death” into most of their minds. He might have Magic Circuits, but he lacked the Magic Crest which only one child in a lineage could inherit. If he had had a Crest, which would have performed self-restoration magecraft when he was on the brink of death, it would have been a different story, but no one had imagined that John could survive without one, much less reappear so much stronger that he seemed like a different person.
But he had.
He had reappeared shrouded in magical energy that far surpassed that of an ordinary mage and made use of that energy to enhance his body and nerves severalfold.

Fate/Strange Fake: Volume 5, Chapter 15 ("Gold & Lions II")