Both
Editor: Henyee Translations
From the looks of it, there was only one way to solve the problem of the Netherworld. The only people in the universe who could deal with the Earthly Venerables of the Netherworld were Chuling, Hei Yang, and Yuan.
That was the only way.
What Xu Tui had to do now was to think of a way to get these three people to deal with the Earthly Venerable One. Moreover, just one of them was probably not enough. The physical strength of these three people should be about the same as an Earthly Venerable. Even if they were strong, their strength was extremely limited.
On the other hand, the Earthly Venerables fought on his home ground in the Samsara Small Universe. A single person would not be able to deal with the Earthly Venerable. He had to think of at least two of them to deal with an Earthly Venerable. It was impossible for the sovereigns of the three alien races to solve the problem of the Blue Star.