Wei Suifeng's expression was serious while on the ghost ship. He checked the damage to Qin Mu's head before immediately tapping his head with his fingers in rapid succession. He tried to use the Great Educational Heavenly Devil Scriptures' Seven Writings of Creation to seal Qin Mu's soul and spirit embryo to prevent his soul from leaving.
Soon, his body became a tiny shadow and entered Qin Mu's Spirit Embryo Divine Treasure in his eyebrows with a whoosh.
The Great Educational Heavenly Devil Scriptures was the technique he got from Saint Woodcutter's scripture. The techniques the Heavenly Saint Cult cultivated were techniques he passed down.
The body becoming a black shadow was called the Phantom Illusion Technique. Besides, there was also the Mirror Resemblance Technique that allowed one's body to become like mirrors.