C237 Blood as Primer

His palm was still bleeding.

I know that this is a contract making. When the red-clothed man made a contract with me, he was also like this. It seems that when ghosts make a contract with others, they have to use their blood as the primer.

I looked at my palm, then back at him.

"So, how do we contract with ghosts that don't have blood?"

Chu Changfeng laughed upon hearing this