Since Yun Jhin needed to stay at the sect to protect it he needed some strong people to take over his expansion missions and while he had gained quite a lot of elders and grand elders as time passed they needed to be kept at the sect for defensive measures, he needed to create another army, a special unit that would be meant only for expansion!
While his children had his 'style' they weren't molded well enough as they haven't gone through life and death battles up till now, they only lived peacefully with their mother while she would usually go out and hunt for food.
They were green flowers without any experience in fighting but first Yun Jhin had to make them strong enough that the moment they stepped out of the sect they wouldn't perish immediately.
With the power of the blood river and the resources that Yun Jhin fed them, along with his personal teaching they were skyrocketing through their cultivation bottlenecks.
