After the Burrow Challenge ends, gathering enough Extraction Value will become quite difficult.
So far, relying on the number of monsters in the Burrow Challenge, he has killed 7 Burrow Heroes and many Burrow Monsters. This has only gained him 8 Strength Attributes; he still needs over 300 points to complete the new 1500 Extraction Value.
If the Burrow Challenge ends and the Burrow Monsters and Burrow Heroes disappear, it will not be easy for Zong Shen to gather another round of Extraction Value.
Unless he attacks tribe forces like the Spider Web Monster Race or the Goblin Tribe.
Otherwise, just by killing the Commander Level or Overlord Level monsters while exploring, even if you gather all of them and put them in front of him to kill, it still wouldn't be enough for a few rounds of Extraction Value.
Only challenges like the Burrow Challenge, led by the Lord System as a community challenge, are the best opportunities to grind for Extraction Value. Missing it would be unjust!
