Because they hadn't concealed their auras, Jack Clark could sense their realms.
These were the elite geniuses of South Sky Martial Height, sifted from batches of students to reach where they are now.
Furthermore, the cultivation atmosphere here was quite positive; at least Jack Clark hadn't seen any fights, quarrels, or even life-and-death duels erupt on a whim in the past two days.
But such tranquility was normal.
Firstly, there were school rules and teacher constraints; secondly, everyone spent their days battling mutated beasts, with their spirits stretched taut.
Under these circumstances, they were already mentally exhausted; who would have the energy to start fights? Wouldn't it be better to rest if there was spare time?
Soon, it was Jack Clark's turn, who was queued up behind, and he politely said to the staff member, "I would like to exchange for four anti-gravity disks fitted with energy crystal fragments."
"Alright, please wait a moment."