Although the Sand of Time in Huangfu Bi'An's hand wasn't a magic treasure or a rare treasure of the world, in terms of preciousness, the Sand of Time was more precious than ordinary magic treasures and rare treasures of the world.
The Sand of Time was created by Huangfu Bi'An after collecting and refining the Great Dao in the mortal realm for his entire life.
The Great Dao of the mortal realm would give birth to a Great Dao unique to that era in every era.
When it came to the Formation Realm, when it came to the Spell Realm, when it came to the Immortal Court and the God Race, they all had their own Great Dao.
These eras were born one after another.
But they were destroyed one after another.
Under the calamity of the mortal realm, no one cared about the Great Dao that were born in these eras. Huangfu Bi'An used this point to gather them everywhere.