In this chapter, ning yuan explains the concept of "authorization" , which means "ability beyond human" . In other words, it's an ability beyond human comprehension. There are different kinds of authorization, but the most important thing is that you can choose the one with the ability you've acquired. For example, you could choose a "desperate cook black wings" and a "girl with shield" to help you with your defense, or a "magic eye crude puppet" to give you protection, or even a "dumb black bird" to make your actions more agile . .