The Fire Dragon King didn't even have time to resist, he could only watch the light disappear from his blood.

Even if I use my spiritual consciousness, I can't sense where it is.

"What is this? What have you done to me?"

The Fire Dragon King's face turned completely gloomy, and he no longer had the previous calculations.

Xu Dong flicked his fingers and said calmly, "Actually, it's nothing, it's just the Thunder God's oath."

"From now on, as long as you don't obey my orders, I can kill you with just one thought."

"No! This is impossible! I don't believe it!"

The Fire Dragon King began to panic, completely panicked.

The reason why he was willing to let Xu Dong set up a Soul Restriction was because he had mastered many secret techniques.

Xu Dong's restriction can be broken by using just a few tricks.

But the Fire Dragon King never imagined that Xu Dong would actually use a method he had never heard of.

What Thor's Oath?

Just listening to it is extraordinary!

"you do not believe?"

Xu Dong smiled jokingly, "This oath contains the power of Lei Ze. Lei Ze is the most powerful beast in the world. As long as your cultivation level does not exceed it, you cannot violate this oath."

After a pause, he said with a half-smile, "Oh, by the way, although I have never seen Lei Ze, I can guess that it has definitely reached the Yu level."

"This kind of cultivation, even with your talent, will take endless years to cultivate!"

"It's simply impossible in a mere hundred years."

Upon hearing this, the Fire Dragon King's expression became completely furious, revealing a hint of hysteria.

"I do not believe!"

"How can you control this secret technique?"

"I know you must be lying to me, right? It must be like this!"

"Hahaha, King Xiaoyao, I admit that you are very strong, but by all means, you are not as knowledgeable as I am. You

It is impossible to master this secret technique."

As the Fire Dragon King spoke, he seemed to believe this statement and looked up to the sky laughing.

He looked as if he was crazy.

Xu Dong flicked his fingers and said with a half-smile, "You don't believe it? Then you can give it a try and see if what I said is true?"

The Fire Dragon King's face suddenly became extremely surprised and suspicious.

His golden eyes were staring at Xu Dong, as if he wanted to see through Xu Dong's heart.

But Xu Dong's face was so light and pale that he couldn't see anything at all.

"Humph! I'll know if it's true or not, I'll try it!"

The Fire Dragon King sneered and did not easily believe what Xu Dong said.

Then, he closed his eyes and chanted some ancient and sacred mantras.

These incantations were very lengthy, as if they were some kind of secret technique, and after listening to them, everyone felt like their heads were swollen.

It's as if the soul is falling into it.

Not only that, everyone also faintly heard the sound of dragon roars!

This voice is very sharp and high-pitched, it can crack metal and stone!

"What is the Fire Dragon King doing?"

"I don't know, we don't understand these spells at all."

"He is probably trying to break King Xiaoyao's restrictions."

"Hmph! This old dragon is too cunning and cunning. He never thought of surrendering to King Xiaoyao from the beginning to the end!"

"What? He seems to be respectful, but he has such thoughts."

"Hmph! He definitely can't break King Xiaoyao's restrictions!"

Everyone started talking about it, but they still couldn't see clearly.

But the people in Medicine God Valley can analyze it with reasonable evidence.

"This is also a secret technique!

"

"An ancient secret technique that may be related to the dragon clan."

"Yes, that dragon roar is the embodiment of this secret technique."

"Can the Fire Dragon King be broken?"

There was a look of expectation in their eyes, hoping that the Fire Dragon King would succeed.

But Dan Chen shook his head.

"This is not the secret technique of a true dragon!"

"The true dragon is the most powerful divine beast in the world. How can the Fire Dragon King have anything to do with it?"

"This should be regarded as the dragon's secret technique."

"So, the Thunder God's oath cannot be broken."

As he finished speaking, there was movement on the field.

"ah!"

Then I heard the Fire Dragon King let out an extremely shrill roar.

Then, he held his head and cried out in pain on the ground.

Rolling around, as if he had suffered a huge blow.

That painful feeling made everyone's scalp numb just by looking at it.

Because it's really scary.

Every vein on the Fire Dragon King's body exploded, and strange purple lines appeared on his skin.

Those purple lines seemed to be alive and constantly moving.

Every squirm can bring great pain to the Fire Dragon King.

"ah!"

"I can't bear it anymore!"

"It feels like it's about to be torn apart."

"It's true! It's true!"

"Please also ask King Xiaoyao to control the restriction. The old dragon has accepted it. This time he has completely accepted it!"

A series of heartbreaking sounds resounded between heaven and earth.

The Fire Dragon King finally gave in.

He felt that if he refused to give in, he would be hurt to death.

He has never suffered this feeling in his life

Pass!

"You believe it now?"

A playful smile flashed in Xu Dong's eyes.

He looked at the Fire Dragon King without any mercy in his eyes.

"I believe it, I really believe it!"

The Fire Dragon King roared heartbreakingly.

He was in so much pain that he couldn't speak, and he was constantly gasping for air.

Hearing this, Xu Dong snorted coldly, "This is the last chance. If you dare to have any objections again, I will kill you."

"Yes Yes."

The Fire Dragon King's face was pale and his heart was ashen.

He never dreamed that this human monk could actually control such a secret technique.

Even with my own ancient magical powers, I am far from able to break through it.

He is now completely convinced and dare not have any more thoughts.
To be continued...