@Boop I mean it works. Just a guess but
Spoiler!
whatever power he's had has been blocked (probably by the mom). When he awakens it, it'll be like an auto-heal. Then he can heal his friend too.
Another spoiler, unrelated to healing but to mc:
Spoiler!
also, think about his spirit animal: white pony + divine grade = mythical white pony creature = unicorn. I know someone out this in a spoiler a while back but this chap def confirmed it.