C48 Dao Mark

Xue Xiaoling sighed and explained to Lu Chen, "A complete Shadowcraft cannot be passed down just by relying on the words recorded in the Shadowcraft's heart technique. It also requires a specific "Dao Mark"."

"Dao Mark? What is that?" Lu Chen asked in puzzlement.

Xue Xiaoling was not good at teaching disciples. After organizing for a long time, she finally said