Ling Tian's formations could merge into the void. Even if a lightning tribulation destroyed them, they could absorb power from the void and restore themselves automatically. So there was no need to set up two formations at once; he could simply alter the Spirit Gathering Formation after one person finished crossing the tribulation.
When it came to deciding who would cross the tribulation first, Lian Yue and Hu Yao both insisted the other go first. They had suppressed their cultivation for so long that whoever went first would naturally have it easier. As for Ling Tian, he didn't mind either way. He believed both Hu Yao and Lian Yue could safely overcome their tribulations.
Although Hu Yao was playful, Hu Ji and the Fox Clan elders had kept a strict eye on her, so her foundation was very solid. Moreover, few among the younger generation of the Demon Race could match her talent. She had already overcome two tribulations and gained plenty of experience. With the formations Ling Tian had set up, overcoming this tribulation would be quite easy for her.
Lian Yue needed even less explanation. With Ling Tian's God Sealing Restriction to help her, her foundation was exceptionally stable. Overcoming the tribulation would likely be much easier for her than for Hu Yao.
"Uh, Sister Yao, you should go first. Yue'er's tribulation is a bit troublesome." Seeing the two of them unable to agree, Ling Tian offered, "Yue'er's is a Nine-Veined Lightning Tribulation, and it has nine stages. It'll probably take quite a while to overcome."
Lian Yue had already overcome four tribulations, and each one had been like this. Ling Tian was quite familiar with them.
"Ah, that terrifying?" Hu Yao gaped, then muttered, "The first two times, I had Single-Veil Lightning Tribulations, but they had nine