I remember a novel in which the protagonist was the wind, and then a spirit went to fix something. His monster beast is a phoenix knife and a demon knife, which seems to be called a demon moon.

Is "the war in the sky", by the non-mainstream

Introduction to the work:

When man first possessed wisdom.

When man first flew into the sky.

When human beings become crazy about power.

Did it ever occur to them?

Who brought them these?

What is the purpose of bringing all this to mankind?

Being different is a demon.

Demons can communicate with human nature, but people are demons.

Which is more noble?

Greed breeds in the heart

Blood dyed the earth red.

Countless soldiers flew into the sky.

The monster's wings blocked the sunlight.

The legend of man and devil begins again. ...