[This is one of the responses he predicted, which makes it easier for Dazai to outright lie through his teeth. Excellent.]

There is a prophecy, you see. One day a great calamity will befall upon this land, all thanks to a malicious evil wizard. They say that an ancient being with red eyes and shall be the hero that will slay this wizard and save the world.

[If eyes could sparkle, Dazai's definitely would by now.]

You match the very same description. One could easily tell just how powerful you are!