Comments of chapter undefined of Shadow Slave: Necrosis

where does necrotic energy go? after all, when the sunny echo gathers shadows hmmm, I understand that you didn't want him to have an easy time, so maybe these fragments are there until he sends the echo back to his soul? and I also saw this question asked to another person, so in my opinion, Cassie should have seen him, and the meeting, you know, night falls and the only hot weather in the area, e.g. the part where the centaur is killed for the first time and it was because of a storm because it became dark