The next day.
Early morning.
Qian woke from his sleep with a start.
After a moment of confusion, he abruptly got up and rushed toward the deepest part of the Limestone Cave.
Only after finding that all seven sand ninjas were still there did he let out a long breath of relief.
Honestly, even though these people had already lost the ability to form hand seals, Qian still felt somewhat uneasy about imprisoning them here.
But he had no other choice. If he wanted to control these people, the best method was undoubtedly to use Genjutsu, followed by various sealing methods.
However.
For the former, his Genjutsu level was not high enough, and his Double Tomoe Sharingan did not support him doing that either.
For the latter, the Sealing Technique and Cursed Seal Technique required were not things he could get his hands on.
Moreover, whether it was the former or the latter, their essence was to interfere with the chakra inside the target's body, thereby achieving the effect of restricting the target's movements.
But he needed these people to refine chakra. If he used such methods to restrict them, that would undoubtedly be putting the cart before the horse.
So he could only adopt the method of strict supervision to guard against them pulling any little tricks.
Fortunately, he had the Sharingan. Ordinary little methods could not be hidden from him.
However, thinking of how he had slept like a log last night, Qian could not help feeling a little embarrassed. Thankfully, nothing had happened, or he would have regretted it to death.
"Ugh, I can't push myself this hard in the future!"
Muttering to himself, Qian took the opportunity to come beside one of the sand ninjas and directly tested the effect of the lv4 "Chakra Absorption Technique."