Huang Xiao froze for a moment, then inwardly mocked himself. How could Senior Xuanyuan not have thought of something he could think of?
"Oh, so you were prepared all along. Although Du Mei and Gu Chengfei have been exposed, we still can't guarantee that all those Old Fools are of one mind with us," Huo Lian said.
"I only need to draw on their power, not necessarily have them here in person. Formations can accomplish that," Xuan Yuanjun said with a nod.
After a little thought, Huang Xiao understood.
They could have those Old Fools store their internal power within formations beforehand, then use that power to activate the supreme treasures.
With Du Mei gone, they could simply find a few more Ghost Dao experts. Even if they fell short of Du Mei, they could still make up for the lack of internal power somewhat.
That was the advantage of formations. If one person's internal power was insufficient, numbers could make up for it. The effect would be somewhat weaker, but it was still better than not using a formation.
Most importantly, this method could prevent those Old Fools from coming into direct contact with the supreme treasures, lest anything unexpected happen.
"Could there still be others who haven't been exposed?" Huang Xiao asked.
"Why not?" Huo Lian said. "Gu Chengfei and the other two thought the three of them would be enough to kill you this time, so there was no need to expose anyone else."
"Huo Lian is right. Although we can breathe a little easier, we still can't be sure there's no one else among those Old Fools on Longevity Daoist's side," Xuan Yuanjun said. "Even if there isn't anyone now, Longevity Daoist could secretly threaten some of them next. As Gu Chengfei said, how many of