Most of the Vampire Lords were immediately tempted by the Fifth Progenitor's claim.
After all, they were 700,000 years behind in their cultivation.
If they could also completely refine the Blood Ancestor's divine blood in their bodies, their path to the tenth stage of the Divine Blood Realm would become smooth and clear.
Who wouldn't want that?
Nevertheless, the Blood Ancestor's power and authority were too great, easily deterring the Vampire Lords from rebelling.
Even if the Soul Master could liberate them and remove their bottlenecks to the tenth stage of the Divine Blood Realm, it was pointless if they couldn't defeat the Blood Ancestor.
Furthermore, if the Blood Ancestor died, they would still enjoy the same benefits.
Thus, there was no need to risk earning the Blood Ancestor's wrath should the Soul Master's side fail.