The forbidden technique of forcibly fusing spirits came at a great cost. He spat out a mouthful of blood, losing 20 years of his life in the process.
Having just spat out two mouthfuls, he lost 40 years of his life.
Moreover, this kind of fusion state couldn't be sustained for too long.
With the addition of the Foundation Establishment ghosts, they temporarily withstood the onslaught of the Blood God Sons.
But it wasn't enough!
"Pfft!" The old Daoist priest actually spat out blood again, forcibly raising the ghosts' cultivation with a secret technique.
The price of doing so was lifespan and the souls of those ghosts.
At this point, the old Daoist's hair had turned completely white.
Blood sprayed onto the ghosts, and they surged in power like they had just consumed a potent medicine.
Their original cultivation at the first level of Foundation Establishment had now increased by two levels to the third level.