After refining the blood, Buller felt that his academic abilities had improved tremendously. Not only had his previous bottleneck been instantly broken through, but he also gained a new understanding of the power of blood and the strength of the undead.
He could not put it into words, but he could feel it.
"Mm, very well. Stay here and contemplate."
"Yes!"
Buller suppressed the excitement in his heart and closed his eyes again.
After a moment, Carl brought Fang Heng and the others he needed to gather to the cavern. Seeing Buller maintaining his cultivation state in the room, everyone was momentarily puzzled and cast curious glances at Fang Heng.
"Do not rush. Please have a seat and wait a moment."
They waited for over half an hour.