"Very good, your strength is indeed beyond my imagination. I underestimated your strength!"

The black python was swallowed, and Chi Yuer's attacks followed one after another, leaving no chance for Demon King Kas to relax.

Demon King Kas kept retreating under the attacks, and the demonic energy in the sky began to dissipate a little.

Gu Yuan in the distance looked delighted. Is he going to defeat the Demon King Kas?

But Chi Yu'er still did not show any joy, because she knew that these were just some minor fights, and the Demon Emperor Kas had been hiding his true strength!

But Chi Yuer didn't know what the Demon King Kas was trying to do. Why was he still hiding his abilities at this time?

"Could it be that someone is secretly watching? Or is he simply trying to hold me back?"

Chi Yuer's expression changed slightly, and she suddenly looked towards the direction of Boulder City.

"It seems that Xiao Ba and Senior Hammer Emperor have already started fighting. I hope nothing will happen." Chi Yuer prayed silently.

"Hey, stop caring about other people and focus on yourself!"

Demon King Kas laughed strangely, and suddenly raised his left hand. A huge blood-red sphere slowly emerged in his hand.

"Hehehe, are you familiar with it?" asked Demon Emperor Kas with a smile.

Chi Yuer narrowed her eyes slightly. Was this just gathered together with the flesh and blood of the disciples of Huoyun Sect?

"You deserve to die!"

Chi Yuer said coldly.

"Hahahaha! The weak have no right to survive! They don't deserve it! They are my people, the Demon King Kas. When I need them, they should make their contribution to me. Now they sacrifice themselves to help me complete the great cause of my demon clan. They have enough to be proud of!"

"You sick thing!"

Seeing Demon Emperor Kas take out such a blood-colored sphere, Chi Yuer thought of a possibility and his face turned pale.

"Hahahaha! Morbid? Tsk tsk tsk, I don't think so. It's better for them to be dead than alive. At least they can make more contributions to me!"

Demon King Kas looked at the huge blood-colored sphere in his hand, opened his mouth, and a huge suction force burst out of his mouth. It seemed that he was planning to swallow the huge blood-colored sphere in his hand.

"You're delusional!"

Chi Yuer took action directly, his figure kept flashing in the space, and in an instant he arrived beside the Demon Emperor Kas.

With flames gushing out of his hands, Chi Yuer rushed directly towards Demon Emperor Kas. Demon Emperor Kas, holding the huge blood-red ball in his hands, turned around and faced Chi Yuer with his back.

Chi Yuer frowned, not understanding what this guy was trying to do, and slapped the Demon Emperor Kas hard on the back. The terrifying power made the Demon Emperor Kas spit out blood. The Demon Emperor Kas's face turned pale instantly, but the corners of his mouth curled up slightly.

With a slap of his palm, Demon King Kas suffered a huge impact, but he used this huge momentum to fly directly into the distance.

"Sly fellow!"

Chi Yu'er bit her silver teeth lightly and naturally saw the intention of the Demon King Kas.

He was using this power to buy himself time to devour the blood cells.

"Nine Heavens Purple!"

Chi Yuer made hand gestures and his figure flashed continuously, but he could not keep up with the speed of Demon Emperor Kas at all.

"Haha, you'd better give up! You can't stop this emperor!"

Demon King Kas suddenly stopped with a smile on his face.

He swallowed the giant blood-red ball directly into his stomach. A hint of satisfaction appeared on his face. He licked his lips and said softly, "I've been preparing for so many years, and this is all I'm missing. Great! I finally got it!"

As soon as he finished speaking, a terrifying aura erupted from the body of Demon Emperor Kas. The demonic energy around him was boiling. The Demon Emperor Kas had a look of enjoyment on his face. "Little girl, your death has come!"

Chi Yuer's expression changed drastically, with a look of disbelief on her face. "Breakthrough?"

Chi Yu'er looked at Demon Emperor Kas. She herself only had the strength of a sixth-level Spirit Emperor, while Demon Emperor Kas was an eighth-level Spirit Emperor before swallowing the blood ball. Now, after swallowing the blood ball, his aura rose rapidly. This was not a good thing for Chi Yu'er.

"Stop it!"

Chi Yuer's face was extremely ugly. She flew over directly and wanted to stop Demon Emperor Kas, but Demon Emperor Kas was obviously unwilling to give her a chance. He directly exchanged a palm strike with Chi Yuer and continued to retreat to the rear, while speeding up his blood ball refining speed.

"Now, let me see if you can still stop me like this!"

The black lines on Demon Emperor Kas's face became increasingly darker, and as the blood cells were rapidly refined into his body, Demon Emperor Kas's aura also rose steadily.

"Hmm, has he broken through already? The feeling of a Ninth Level Spirit Emperor is indeed different!"

After Demon Emperor Kas flashed in the air for a few moments, his aura had completely stabilized.

At this moment, his aura has completely settled at the level of the ninth-level Spirit Emperor.

"Ninth-level Spirit Emperor!"

Chi Yuer stepped on the void and frowned as he looked at the Demon Emperor Kas who had already entered the ninth level of the Spirit Emperor realm.

"Hahaha, you still couldn't stop me after all!"

Demon King Kas looked at Chi Yuer and said with a sneer.

"Haha, so what if you're a Ninth Level Spirit Emperor? You can't do anything to me, and you can do the same to me, a Ninth Level Spirit Emperor!"

"Tsk tsk, what a big mouth you have! But seeing as you have this strange flame on your body, you must be from a big sect or family, and your status should not be low. Killing you can at least reduce an obstacle for my demon clan!"

"Stop talking nonsense! Use your last resort!"

Chi Yu'er sneered, with a hint of hesitation in her eyes. Then she sighed softly and said, "I didn't intend to remove the seal, but now that you have reached the ninth level of Spirit Emperor, I will definitely not let you go!"

"Hahahaha! What a joke! How can a little girl like you…"

Before Demon King Kas could finish his words, he suddenly stopped and looked at Chi Yuer in disbelief.

At this moment, Chi Yuer formed a rather mysterious mark with her hands, and suddenly a dazzling light came out from between her eyebrows. When the light faded away, a rather complicated mark appeared on her forehead, which looked like a miniature phoenix!

“This…what is this?”

Demon King Kas suddenly felt something was wrong. Although he didn't know what Chi Yuer was doing, he had a hunch that he had to stop Chi Yuer and not let him continue.

"Want to stop me? It's too late!"

A terrifying aura erupted from Chi Yuer's body. Her body seemed to straighten up a little. Although her appearance had not changed at all, her whole temperament had matured. The previous Chi Yuer was a girl of sixteen or seventeen, but now she was a peach of twenty-five or twenty-six years old, whose every move was full of temptation.

Gu Yuan hid in the dark, looking at the fish in the pond, completely stunned.