Talk:Overlord Volume 11/@comment-210.195.104.138-20161015124138/@comment-59.191.194.34-20161017072321

if you read through volume 10, it was hinted that short battles will increase level up a person (gaining exp). Furthermore, it was mentioned in the web novel, Katze massacre arc that Avarice and Generous collected the souls of those who died there (as exp). Likely, it did the same thing when Mare wore it. Of course, in the New World,  it might not be the only way to gain level. Like the Dragons which gain Level as they age.