However, afterwards, he felt those NPCs might play some unexpectedly useful roles, so he allowed them to exist till now out of sheer perversity. Yet, he didn't anticipate that once Zhou Tian indulged in pleasure, Hu Fei would instantly think of manipulating those NPCs.
Consequently, after such idea popped in his mind, Hu Fei immediately directed an action against those NPCs.
For Hu Fei, manipulating those NPCs was too easy.
Hu Fei knew clearly why those NPCs were able to survive initially. Although Zhou Tian's power has tremendously improved now, if those Divine Beasts really are sealed under the NPC Holy City, once the NPC side releases all those Divine Beasts, none of Zhou Tian's subordinates would be their match. By then, even if Zhou Tian himself lacked the will to fight, he would most likely take action at that moment!
As for how to force those NPCs to release the Divine Beasts sealed in their holy city, that was not a problem for Hu Fei at all.