Moreover, these Ghost Soldiers countered the Death Race and other Ghost creatures to some extent, which would be of use in future battles.
Zhao Fu already predicted that the Ghost Soldiers would be one of Great Qin's main forces in the future. However, they had to conquer more Kingdoms and obtain more Royal Seals.
It was a pity that the Great Qin Seal could not gather power anymore; if Zhao Fu did not use his other powers and just relied on his Stage 8 Cultivation, he would definitely die if he tried to assassinate the Kings of other Kingdoms.
After all, they had much higher cultivation and had countless soldiers and experts guarding them. After losing the Great Qin Seal's power, it would be much more difficult for Zhao Fu to deal with them.