The Twin Mystery Treasure Map served as the foundation for the second and third tiers of the Secret Realm, as well as the pass for entering and exiting it.
Holding the Feathering Sect master seal bestowed upon him by his master, Lu Bei easily completed the ritual refining process. At the same time, he gained the authority to freely enter, exit, and seal the Secret Realm.
The Secret Realm here did not refer merely to the second and third tiers, but encompassed the entire domain, including the first tier.
Chapter 257