Because she was the best candidate.
As the leader of the Great Star Dou Forest, Di Tian could not bring himself to discuss such a matter with the Far North.
As for the other Ferocious Beasts, they had all fought the Extreme North and been defeated. They felt too humiliated to go there.
Most importantly, the boundless killing intent Ling Xiao had unleashed worried them. They feared that one careless word would leave them buried in the Extreme North.
The Emerald Swan was kind by nature. Moreover, while Ling Xiao and Di Tian had fought, Bi Ji had continuously healed Ling Xiao's injuries, so their relationship had eased somewhat.
After hearing Di Tian's decision, Bi Ji readily nodded in agreement.
She had proposed the idea herself, so it was only natural for her to travel to the Extreme North.
Before Bi Ji headed to the Extreme North, Di Tian asked whether she needed him to tear open space and send her there.
Bi Ji immediately rejected the suggestion.
She planned to see how many humans were eyeing the Extreme North along the way.
Only after informing the Extreme North of this could Bi Ji explain her true purpose.
She had been stuck at five hundred and ninety thousand years for a long time, but she had never been confident that she could safely endure it.
So she wanted to find Ling Xiao and have him help her overcome this Heavenly Tribulation.
Bi Ji had already told Di Tian about this idea after returning.
Of the Ferocious Beasts currently facing tribulation, only she and Di Tian remained.
But Di Tian cared too much about his pride. He would never lower himself to seek out Ling Xiao.
Furthermore, when Di Tian had fought Ling Xiao, he had discovered that Ling Xiao was