Qiu Yunkai didn't know much about the Heart-Piercing Worm; he had only read about it in books and knew that it was not easy to deal with. Once it entered a person's body, expelling it wasn't easy.
Especially since this Heart-Piercing Worm had been nurtured with the heartblood of Senbon Kame and the lives of hundreds of people, it was filled with endless Evil Qi.
A common martial artist in the Master Realm couldn't resist the erosion of the Heart-Piercing Worm. Even Qiu Yunkai himself wasn't confident in dealing with the creature; at best, he could only suppress it temporarily in one of the acupoints, leaving the problem to be solved later.
Seeing Han Yu come out safe and sound without any unusual expression brought Qiu Yunkai both relief and surprise.
He was very curious about how Han Yu had dealt with the Heart-Piercing Worm just now.
"The Heart-Piercing Worm has been blasted into dregs by my Hidden Power; I ask your forgiveness for not being able to disclose how exactly,"