Amadeus gave ground immediately and the shadow-held blades retreated with him, just in time to avoid the burst of Light the hero detonated in his wound to seal it.

A costly way of healing, this. The touch of the Heavens on mortal flesh was never light, or without consequence. Amadeus could see the function it was meant for, though. If the White Knight was truly meant to face Catherine after she’d succeeded him, then he gave the man six in ten odds of winning a duel against her. His apprentice still had the nasty habit of overcommitting at close range once she’d drawn blood, and a semi-offensive form of healing like this would be damaging to her.

- Book 3, Villainous Interlude: Calamity II

The blade drove itself into the White Knight’s back, piercing a lung before the Light burst out and scrapped it. Unfortunate, though inevitable. He only had so many blades hidden in his shadow, and two thirds were already gone.

...

Instead he angled his blade to the side and carved into the White Knight’s throat, the full weight of his body pivoting behind him. Blood sprayed out as he gave ground, closed by a burst of Light. That would have been a kill, on a lesser hero.

- Book 3, Villainous Interlude: Calamity III