That's a pretty decent power, as long as he does have people willing to donate mana. Who knows how the original pig lord managed to gather such people, but if this new Leold can convince the folks that he's, in fact, a great guy, it shouldn't be a problem in situations like this. He just wouldn't necessarily be able to use the power for nefarious purposes. But since he wouldn't anyway, it's no problem. All the surviving soldiers here would boost Leold's positive reputation by telling about his deeds to family and friends.