Yi Yun had never exited Spirit Gathering Palace ever since he entered it.
The 'Book of Heaven's Advent' floated in front of him while his his eyes were tightly shut.
And around Yi Yun, there were occasional images that flashed.
Cultivation knew nothing about time. Furthermore, when it came to cultivating the Dao of Time at the level of the 'Book of Heaven's Advent', even if many warriors were given the opportunity to read the 'Book of Heaven's Advent', it would be like they were reading an indecipherable book, leaving them baffled.
And most terrifying of all was that when cultivating the 'Book of Heaven's Advent', they would immerse themselves into the turbulence of time, losing themselves. Time might pass in a flash and by the time they awaken, too much time would have passed but they would've gained nothing to speak of!