The black spheres are not useless; they indeed fail to cause effective damage, but they divide the group of Baiyu and others, providing an opportunity for the outer sanctums.
The death of the Parasitic Mage just now was not solely the work of one Holy Domain.
More importantly, once there are casualties and Baiyu and his group can't retaliate immediately, it will provoke even more malice.
Baiyu's judgment is entirely correct; even if the outer mages harbor no malice, there are opportunists who help sow discord!
"With the black spheres causing interference, these Divine Lord's lackeys can't fight collectively. Our chance has come!"
"Kill them, force them back to reality, and we'll have the chance to seize the Ghost Inheritance!"
"Why should the Angel Inheritance be given to the Divine Lord? This is clearly the inheritance left for us by the Ghost Prophet!"
"So what if it's the Divine Lord, can they pursue us from the Void Realm to reality?"
