After flying out of Guangguang River Valley, Black Oil Dragon Rosai continued north along the Shanhe Trade Route. The howling snowstorm could not obstruct his vision or senses.
To a wyvern capable of sensing Cold Spring Points, hundreds of kilometers of foggy snowfields were no different from clear warm lands.
"Polly, I don't think we've tested our current speeds yet, have we?" Flight was always boring, so Russell suddenly suggested, "Why not take this opportunity to try?"
"Okay!"
In an instant, the Lord of Thunder Mark transformed into Unicorn Polly. She spread her enormous feathered wings, and wild winds and lightning surged beneath them. Then she shot forward as though she had become lightning itself.
In the blink of an eye, she vanished from Russell's sight, then came streaking back from the distance like a bolt of lightning, returning to Rosai's side.
"I've surpassed the speed of sound, Russell! My speed has surpassed the speed of sound!" Polly said excitedly.
There was no sonic boom.
At extreme speed, Polly truly seemed to have transformed into a bolt of lightning, ignoring air resistance and vibrations.
"That's awesome!" Russell praised.
When Russell tested Wind Walk himself, even with his new pseudo-dragon essence driving it, he could only match Rosai's speed—five hundred kilometers per hour. He was less than half as fast as Polly.
However, although Polly had advanced into a pseudo-dragon, she could still use Phantom Beast Fusion.
With Phantom Beast Fusion, Russell could barely reach the speed of sound. Moreover, the consumption was not great, allowing him to maintain the fusion for a long time.
"Roar!" Rosai let out an indignant roar.
In his mind, he complained mournfully, "Father, you and Polly are far too fast. I can't catch up to you."
"Haha, it's fine. We'll wait for you," Russell reassured