Apocalypse befell, and roommates performed a skyward ritual. As the fog descended, the Book of Blood Spirit appeared in the hands of all survivors, and only those with a Contract monster could survive. Su Han directed his gaze to the neighbor who had already mutated and twisted, silently pulling out a gleaming fruit knife... Grotesque meat corpses, giant spiders with gaping mouths, eyeballs enveloping the city, one-eyed sharp-toothed hand monsters... Civilization fell, cities shattered, and all humans became meat for the monsters. There was only one way to survive: Use monsters to fight monsters.
There was no prolonged lingering; Su Han came back from Bai Qilan's place with some additional materials and then returned to his room on Summer Garden Avenue.
At Summer Garden Mall, Su Han looked through the materials and discovered that they contained conjectures about Spiritual Energy, Talent, the human body, and so on, which represented the current understanding of these fields.
It couldn't be said to be absolutely correct or entirely without error, but it was certainly one of the latest versions humanity had come up with.
There was also a book about meditation from before the apocalypse.
Bai Qilan, based on her research and current findings, tentatively classified Talents into two categories. One category was the perception type like hers, focusing on perception, spirit, and other aspects.