The Azure Luan Sect truly deserved its reputation as Li Province's number one. Its grandeur was beyond comparison with ordinary sects.
That enormous mountain-protecting formation alone, covering a radius of several thousand li, was enough to make people stare in awe.
One had to know that the Azure Luan Sect's mountain-protecting formation was nothing the Heavenly Corpse Sect's formation could compare to.
Li Su was still confident he could force his way through the Heavenly Corpse Sect's mountain-protecting formation.
But as for the Azure Luan Sect's mountain-protecting formation, let alone now—even if he reached the great completion of Foundation Establishment, he would not have the slightest confidence.
Forget the mysterious patterns and dazzling seven-colored radiance of this formation.
Its thickness alone was a full hundred meters. Could anyone believe that?
What did a hundred-meter-thick energy barrier even mean? Li Su felt that even if someone threw a nuclear bomb at it, it would only ripple twice.
This was no formation meant to defend against Foundation Establishment or Golden Core cultivators.
Even if immortals personally took the field, they would not be able to break this formation anytime soon.
As he entered it, Li Su could not help but suck in a sharp breath, a chill shooting from the soles of his feet straight to the top of his head.
Killing formation!
This formation was not merely a defensive formation. It also came equipped with a killing formation that could shift from defense to offense. Though most of it was concealed, leaving Li Su unable to tell what kind of killing formation it was, one thing was certain: once it transformed, even immortals would have to perish.
And it was the sort where even magical treasures could not save them.
Not only did this formation gather the spiritual energy of tens