There was a speech in the novel? Anyone care to tell what chapter is that?
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Changing his mentality was a good idea. Yes, power comes with responsibility but it's also nice to admit to himself that he's not some all-powerful being. Going there to get stronger is definitely better than trying to be a hero.
That said, the giants are controlled/programmed? Interesting. Maybe we'll get to see other monarchs in the next chapters. It's been shown in the previous chapters that these monsters from the gates are just being mind controlled. But we never knew the reason.