Lin Huang spent a week grinding in the core layer.
He spent a whole seven days and finally covered the entire core layer.
The total number of major dao-level monsters he killed throughout those seven days had surpassed 13,000.
All of those monsters had mastered over 800,000 Dao seals.
However, completing this did not mean that he had cleared the entire core layer.
He had hunted within circles measuring one million kilometers in diameter each in the core layer; there were still gaps between those circles.
Therefore, after the first round of hunting was completed, Lin Huang soon commenced the second round of hunting.
This time, he headed to those gaps in between his previous hunting zones and started clearing them out.
This entire process took four days.
Throughout those four days, he killed over 3,500 major dao-level monsters.
He had cleared out almost all of the monsters in the entire core layer.