Seeing that the giant bull had recovered its previous speed and momentum, Murong Piaopiao and Zhao Jin were both shocked, but Xiao Potian felt very interesting.

According to the law of conservation of energy, there is no perpetual motion machine in this world, because there will always be a certain loss in the energy during the conversion process, and it cannot reach 100%.

The reason why Murong Piaopiao and Zhao Jin were shocked was that they regarded the giant bull as a separate system. A separate system went from stationary to moving without clear stress and ran faster and faster. This was completely unreasonable because there was no way to find the driving force.

But if the giant bull is integrated into the surrounding environment, it becomes very easy to understand. There is a complex system in the giant bull's body that can convert the weak wind into its most primitive driving force, and then readjust the direction through the most primitive compass.

After Xiao Potian understood this principle, he pushed his palms out suddenly, and a powerful wave of air rushed straight to the giant bull.

Because the palm force introduced by Xiao Potian was different from the initial wind force direction, the giant bull had to make a re-adjustment, and the speed naturally slowed down.

Seeing that his guess was verified, Xiao Potian clenched his palms around the giant bull and made the air around him rotate randomly and form a huge vortex.

Ji Wuyun obviously didn't expect Xiao Potian to discover the essence of the giant bull so soon, and knew that this method could no longer pose a threat to Xiao Potian. After a few turns, the giant bull slowly retreated back.

But then a dark piece appeared in the sky. In addition to the wooden birds, Xiao Potian also saw several lifelike wooden men.

"Zhao Jin, you can find a way to find Ji Wuyun for me and give these things in the air to me and Apiao." Xiao Potian said to Zhao Jin in a low voice.

Zhao Jin nodded and ran quickly along the stream. Obviously, he had a judgment in his heart.

At this moment, music full of ancient charm came from the sky, low and gentle, like crying and complaining, full of the smell of sacrifice, making people feel inexplicably depressed.

Xiao Potian pulled out the small building and listened to the rain, and stood with a sword.

And beside him, Murong Piaopiao held the Fish Intestine Sword and was eager to try it out.

Just as the dark thing was about to reach Xiao Potian and the others' heads, they suddenly retreated. The dark clouds just now became clear again, and there was a dead silence around them.

"Little girl, are you holding the Fish Intestine Sword in your hand?" Ji Wuyun's surprised voice came from the air.

"It's good to know. If you dare to let your wood come over, I will cut it all for you." Murong Piaopiao said coldly.

"These woods have been specially processed by me. Generally, swords cannot hurt them at all, but the Fish Intestine Sword can do it, and the demonic energy of this Fish Intestine Sword has not been eliminated. Little girl, I am worried that you can't control it. What if we make a deal? Give me the Fish Intestine Sword and choose something from me." Ji Wuyun said in a negotiating tone.

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Chapter completed!