Fun Territory Defense by the Optimistic Lord

A man is reborn as Van, a noble boy who trains hard to become a genius. But when people learn he has “production magic,” they exile him to a distant village. Though others dismiss his power as worthless, it’s actually incredible—he can create anything if he has the right materials. Using his past-life knowledge and this overpowered magic, he transforms the tiny, struggling village into a thriving city.