It's said that the worlds were full of idiots.
Kyoya felt like he could see the real meaning of these words in front of himself. There were countless dead bodies laying around him with a few stronger ones trying to defend themselves against his knife and concepts.
"What the hell is this guy? It is as if the fog doesn't even work on him."
"We were too stupid… If this guy alone can deal with us, then the black castle would swallow us alive… Fuck it…"
"Maybe we can still survive… Hey, you! You! Please, don't go for us! If you want our equipment, then take it all! Please, please!"
After the pressure became unbearable for the surviving adventurers, one of them shouted desperately to survive. This was the trigger for the rest to do the same and so they all begged in a unison.