Lu Yan's mind was greatly shaken.
Among the three answers given by Longevity Celestial Venerable, the first two were within Lu Yan's expectations.
The complete version of Celestial Dao, indeed, has the ability to suppress This World's Only One.
For instance, it is so between the Apocalypse Celestial Dao and Supreme Will; if not for Supreme Will controlling the cultivation system of the Apocalypse Version, it would be impossible to oppose the home-field advantage of the Apocalypse Celestial Dao.
As for the second, the Boundary Opening Treasure, so far the only one Lu Yan knows of is the Profound Vagina Door.
The Boundary Opening Treasure possesses a status comparable to the collective immortals, even among them, not everyone can master the Boundary Opening Treasure. If mastering this treasure can contend with This World's Only One, it's also reasonable.
