"At first, I almost went crazy because there was nothing. Then I realized. Ah! This is a fantasy world! But before I knew it, I became a god. And then people who wanted to kill me appeared! So I thought, well, then you should get a taste of your own medicine." "...That's your reason for destroying the city?" "Yep." "Isn't this guy a complete lunatic?" How disappointing. If you started like I did, you'd end up the same way, wouldn't you?