yall talk as if there's no issue with the basic premise - Laviens are the best force against the demon lords, and Bless is supposed to be "da hero" so she has to grow up strong. And then they chuck a live grenade into the crib and hope for the best. "She'll overcome it or she'll die" - great gamble. And it's not even confirmed the demon lord will awaken. So if he doesn't awaken, you're just risking a life for nothing, if he does, you're risking the only way to fight him. Not a great plan.
Honestly, not a pleasant read so far, the writer is dropping in too many plot threads too quickly. It's ok to let things develop, you don't have to build a whole world of intrigue instantly.