C674 What kind of attitude is this?

The formation pattern that caused Du Changfeng to suffer a loss was called the Brahma Sound Formation. The guards took off the spirals hanging around their waists, and forcefully blew on them with their mouths, following that a strange sound rang out, first low and deep, then sharp and ear-piercing. The sound waves covered the sky and the earth, causing one to feel as if they were in a rough sea