C60 Phantom out of Coffin
The Vermillion Bird Concealing Ghost was one of the Daoist's secret formations. It could exorcise ghosts and exorcise devils.
There was definitely some kind of evil being inside the Blood Coffin of the Tu's ancestor. Once the coffin was opened, if one was not prepared, it might cause everyone present to die.
"Hey, who exactly are you? "You kept saying that you're a Daoist