User blog comment:TheCarrotSaysYumYum/FT0 5 - A Moonlit Lake, Review./@comment-4829046-20141117141022/@comment-7418318-20141118092533

It'd be an interesting twist if Precht's persue of the Ultimate Magic came to be because he blamed himself for being unable to save Mavis' life.

If he started out with "I need to get stronger so I can protect my comrades" but the more power he gained, the more his focus shifted to gaining power for it's own sake until he no longer cared for his companions.

But the defeat at the hands of Fairy Tail and Makarov's words opened his eyes and thus returned him to his old caring self. That would be one explanation for his behaviour after his soul was freed from Franmalth. While his post-mortem actions can be explained with selfish reasons, his facial expression in that scene always made me think that he really did give Fairy Tail adive because he wanted to be of help to them.