Because Zhou Tian had already discovered the weakness of their domain, the undead trying to conceal it at this point was meaningless. Thus, what was initially a 'safety zone' had now truly become the node of the undead domain. Although they could avoid the assault of the outside undead army if they ran there, if they were in that region, they would have to face the attack of those saint-level undead.
From a certain perspective, after entering that region, Zhou Tian and his team weren't just unsafe, their situation was considerably worse than at the beginning.
Regardless of how threatening the undead army might be to Zhou Tian and his team, their only method to win would be to wear them down. But when it comes to their inherent strength, the ordinary undead posed no threat to them.
