Black-White College was located in the western part of Anchan City, covering an area of roughly nine hundred kilometers.
Among immortal cultivator sects, it was considered relatively small.
The other top sects in Anchan Commandery, such as the Heavenly Saint Sect and the Blood God Sect, each covered tens of thousands of kilometers, like entire kingdoms no smaller than Anchan City itself.
Only because Black-White College was situated within Anchan City and had relatively few members did it occupy such a small area.
Yet Black-White College still contained continuous mountain ranges and winding rivers.
Led by the black-haired middle-aged man, Gu Yi and the others quickly traveled a hundred kilometers before arriving at a valley.
"Stop!" the black-haired middle-aged man said.
The several hundred young prodigies all halted.
Rumble!
The black-haired middle-aged man shouted, and ripples suddenly emerged throughout the broad valley, which spanned several kilometers. Heaven and Earth Origin Qi surged and churned as an enormous sealing formation abruptly took shape.
The formation covered an immense area. It encompassed not only the valley but also several nearby peaks, trapping Gu Huang and the several hundred others within it.
Amid mechanical clattering, enormous phantoms flew out from a cave in the cliff face of one mountain within the sealing formation. There were exactly eight hundred and ten of them.
Everyone looked closely and saw that they were eight hundred and ten dragon heads, floating in midair with their mouths open toward the ground below.
"The Puppet Grand Formation!"
"A formation made up of eight hundred and ten puppets!"
Among the several hundred young Immortal Cultivators in the valley, many came from major tribes. Some had even participated in Black-White College's assessments multiple times, and they immediately recognized the origins of these dragon heads.
—Black-White College's disciple selection trials had always