You heard her. Time to help all the girls in the village have babies.
What a convenient anti-aging training. Like this, he can functionally make any living ally immortal, can't he?
Once again, everyone's somewhat misunderstanding him because they need to always be making babies, but....
....
Hmm. actually, won't overpopulation become kind of a problem if their birth rates suddenly quintuple? Maybe not right away since the last birth was a decade ago, but after a few years...
to completely fix the birthing issue, make magic tools that can fix it so he doesn't have to do it himself, and cause a massive population boom among the ghouls in a year or two.
He becomes the emperor of a massive amount of land, so overpopulation never becomes an issue. And he only uses the rejuv spell on a couple of people, oddly enough.
That's nothing,though.
Wait till you see what he does to his mother, lol.