Releasing Deng Yin was one of Shi Feiyang's pre-planned steps.
Three monks and two nuns, as well as top-tier masters like Xin Ru, were the ceiling of this world's existence.
What defines 'top-tier'? What is meant by 'the ceiling'? It implies that there is no existence beyond them, that there may be small differences in skill among them, but it is impossible to surpass them by a whole level. There would be no technique capable of defeating them as easily as cutting vegetables.
Shi Feiyang's current mana had not reached this level yet; he had to rely on various magical treasures to battle with these high-level individuals.
If the opponent brought in more people, the best course of action for Shi Feiyang would be to immediately shake them off.
He was attacked with full force by Xin Ru Nun in the Sacred Tomb, with Master Ren arriving at top speed from Little Cold Mountain, yet Deng Yin indicated he did not want to come out, preferring to continue enjoying his carefree life inside.