What does it refer to?

Mysterious occurrences loom; the entire world dramatically changes.
The fate of individuals and nations becomes bound to AnalogHorror (rule kaidan), and once the chosen of destiny fail, it means countless people in their corresponding nation will be slaughtered by the strange phenomena.
The entire world falls into unrest, panic, and despair.
Until an absolutely unexpected individual joins the AnalogHorror game.
Xiao Yiwang glanced at the weird world before him and then at the examination admission ticket in his hand.
"Have middle school entrance exams always been this complicated? Well, it does prove my intelligence!"
"I am retarded, but selected to join the analoghorror game?!"

Livestreaming: I am retarded, but selected to join the analoghorror game?!

Karim was still struggling to wrap his mind around these things that far surpassed common sense, and he found it truly hard to believe! 


The Doctor too had just managed to hoist herself off the floor and back into her chair. She looked at Xiao Yi and Xu Woshi with eyes that treated them as if they were monsters. 


Xiao Yi and Xu Woshi were still clueless about the situation. 


Karim cautiously moved a few steps closer to the pair, his voice trembling as he asked, 


"Did you... clean up all the Mutants in that entire area?" 


"Yeah, that's right," Xiao Yi replied calmly, "Didn't I say that we cleaned up 'all' of the Mutants?" 


"...Cough, cough!" Karim couldn't help but cough violently at Xiao Yi's words. 


Holy smokes! So that's what you meant by all!


Seeing Karim's reaction, Xu Woshi couldn't help but ask, 


Chapter 124 Traitor