Another Universe?

"Yes, Rune's case was much simpler, 

In Lyriana and Eisheth's case, however, I cannot help them because if I rebuild their foundation and start everything from scratch, they would have only a few decades to form a Law, which is not enough unless..." 

"Unless?" 

Aeliana frowned. 

"Unless they go through the Trials." 

Nux answered. 

This was the only solution he had come up with. 

Letting them restart their lives inside the Illusion, understand themselves, form their Law, it was similar to how almost all of Nux's wives had formed their Laws, Lyriana and Eisheth had no need to be any different. 

And once they form their Law inside the Illusion, they can come out, Nux would devour their Cultivation, push them back to Semi Saint Stage, they would then form their Law similar to the one they had formed inside the Illusion, Nux would then help them advance to Saint and them the Divine Stage.