In the Pingyao Immortal Domain, several great deities such as Immortal Venerable Taiji and Zhenmo Xianzun had once fallen.
The reason Han Lin was sent was because he possessed the power of the Heavenly Dao's origin, and his ancient blood could accommodate all cultivation techniques originating from the Heavenly Dao.
Immortal Venerable Taiji also possessed ancient blood, so he must have set up certain restrictions to ensure that only someone capable of bearing the grand fortune of the future Immortal Realm could obtain his legacy.
Chapter 281