I wonder if the shopkeeper is a demon; he has strange eyes.
It's interesting to learn that it's dangerous to use magic with an underdeveloped body. Shouldn't he have taken the opportunity to ask more about that? It seems quite important to know the risks of what you're doing.
Well, I don't expect him to get permanently hurt since he's the protagonist.
Besides, right now, rather than magic, it's the monster that appeared that's more likely to hurt him. It's quite strange how a monster appeared seemingly out of nowhere. Are there monster summoners who infiltrated the city or something?
Anyways, I'm looking forward to more chapters.