Not long after Ye Qing killed Mister Yulong, he heard a notification from the system.
"Ding! Congratulations to the host. Super King's Treasure Chest has been detected. Please pick it up as soon as possible!"
Ye Qing listened to the system's voice and a bright smile appeared on his face. Sure enough, a treasure chest appeared at the place where Mister Yulong had disappeared.
According to the system's rules, the stronger the enemy killed, the higher the probability of a treasure chest dropping.
Ye Qing had killed Mister Yulong, the legendary genius, so it was reasonable for him to get the treasure chest.
Stepping out, Ye Qing walked to the location of the treasure chest and opened it.
"Ding! Congratulations to the host for opening the Super King's Treasure Chest. You have obtained a special item, one million Slaughter Energy!"
Ye Qing listened to the system's notification and suddenly his heart skipped a beat. One million Slaughter Energy sounded very awesome.
"Just right, my Celestial Slaying Sword still needs Slaughter Energy. I'll use it to upgrade the Celestial Slaying Sword's quality!"
Ye Qing's eyes lit up. The Celestial Slaying Sword that he had obtained in the past was very special. It could be upgraded by devouring Slaughter Energy and constantly improve its quality.
Now, the Celestial Slaying Sword had become a supreme grade Divine Artifact and its power was extraordinary.
Of course, Ye Qing already had many semi-ultimate Divine Artifacts in his hands. He also had the Power Stone, which was a real ultimate Divine Artifact. He was no longer interested in supreme grade Divine Artifacts.
One million Slaughter Energy might be able to upgrade the Celestial Slaying Sword to an ultimate Divine Artifact!
The so-called one million Slaughter Energy was the Slaughter Energy that was born from killing one million creatures. Under normal circumstances, if Ye Qing wanted to upgrade the Celestial Slaying Sword, he would have to hold the Celestial Slaying Sword and kill people himself.
But with the Slaughter Energy that came out of the treasure chest, things were much simpler.
Logically speaking, the Slaughter Energy could not be stored. If it was not absorbed after killing people, the Slaughter Energy would dissipate.
But the Super King's Treasure Chest that was opened by the system was so magical. It was the existence of cheating and directly provided one million Slaughter Energy.
With a thought, Ye Qing took out the Celestial Slaying Sword from the System Space. Speaking of which, he had not used the Celestial Slaying Sword for a long time. The main reason was that the Celestial Slaying Sword's quality was not enough to keep up with his pace.
In fact, if the Immortal Slaying Sword's quality was increased, it would be more powerful than many divine artifacts of the same quality.
A divine sword that had grown up amidst slaughter was definitely not to be underestimated.
"Whoosh!" Ye Qing took out the Slaying Immortal Sword. It emitted a crimson light and floated in the air.
The Immortal Slaying Sword was surrounded by a lot of Slaughter Qi, forming a scene of a mountain of corpses and a sea of blood. A monstrous Slaughter Qi permeated the Sacred Medicine Island.
The geniuses on the Sacred Medicine Island were all stunned. They didn't know where such a terrifying killing intent had come from. It was simply too frightening.
"Oh my god, why is there such a terrifying killing intent after Prince Yulong's death?"
"I don't understand. I really don't understand. Could it be that the Slaughter Qi didn't come from Prince Yulong, but something else?"
A commotion broke out on the Sacred Medicine Island. Everyone's eyes were wide open. They didn't understand, but they felt that it was awesome.
In the next moment, the blood-red sword floating in the air emitted an incomparably demonic luster. After absorbing the slaughter energy, the body of the sword trembled and emitted a shocking buzzing sound, as if it was undergoing some sort of transformation!
"Guys, look! Why can he bring a divine artifact into the battlefield?"
"Damn, you just realized that he has a divine artifact?
I don't know how he managed to hide it from everyone. Anyway, I'm already used to it, "Liu Dali said from the side.
Previously, when they were tricked on Noah's Ark, Ye Qing had left with a shiny golden Ruyi Jingu Bang.
Divine artifacts couldn't be used in the Thousand Country Battlefield. This rule didn't apply to Ye Qing. He could take out any divine artifact he wanted.
"Guys, look! That sword has such a strong Slaughter Qi. It seems like it's about to be upgraded!"
The crowd was even more shocked. Their jaws almost dropped. The scene before them was too shocking.
One could imagine the difficulty of upgrading a supreme-grade divine artifact to an ultimate divine artifact. It required a lot of precious refining materials and a world-renowned blacksmith. Only then would there be a chance of success.
Ye Qing didn't even use any refining materials. He just let the crimson longsword absorb some Slaughter Qi, and it was about to be upgraded.
A million Slaughter Qi. Although it sounded like a lot, after opening the treasure chest, the Slaughter Qi continued to dissipate. The remaining Slaughter Qi that was absorbed by the Celestial Slayer Sword was probably less than 50%.
The speed at which the Celestial Slayer Sword absorbed the Slaughter Qi was already very fast. However, the speed at which the Slaughter Qi dissipated was faster than expected.
In just a short two minutes, there wasn't much Slaughter Qi left in the sky.
The Celestial Slayer Sword trembled violently and emitted a crisp buzzing sound.
With a buzzing sound, the Celestial Slayer Sword let out a loud buzzing sound. In the next moment, the Slaughter Qi in the sky dissipated completely.
It couldn't be helped. The Celestial Slayer Sword was forced to stop absorbing the Slaughter Qi. With so much Slaughter Qi, it was too difficult to absorb all of it.
Ye Qing's figure moved. Holding the Slaughter Qi in his hand, his eyes shone brightly. Although the Celestial Slayer Sword hadn't been upgraded to an ultimate divine artifact, it was already half successful.
After absorbing a large amount of Slaughter Qi, the Celestial Slayer Sword became a half-step ultimate divine artifact. Its power was more than ten times stronger than before!
Holding the Celestial Slayer Sword, Ye Qing seemed to see the scene of the Asura Sea. The Celestial Slayer Sword that was born from slaughter was indeed powerful!
In the future, Ye Qing would have another divine weapon by his side.
The corner of his mouth raised slightly. He thought of the Dragon Slaying Saber and then turned his gaze to the Primordial Stellar Dragon.
It was very simple to upgrade the quality of the Dragon Slaying Saber. He just needed to let the Dragon Slaying Saber absorb the dragon blood.
Ye Qing couldn't bear to let go of his own dragon blood. The blood of the Supreme Dragon God was too precious.
And the blood of the Primordial Stellar Dragon was very suitable. For the current Dragon Slaying Saber, absorbing the blood of the Primordial Stellar Dragon was more than enough.
"Hey, you nine dragons, lie down. Don't move, and don't defend!"
Ye Qing transmitted a divine thought and then took out the Dragon Slaying Saber.
A resplendent saber light flashed and slashed at one of the Primordial Stellar Dragon.
With a clang, the Dragon Slaying Saber bounced back, and the Primordial Stellar Dragon was unharmed.
Ye Qing frowned slightly. It seemed that the current Dragon Slaying Saber was still too weak. It couldn't even break the skin of the Primordial Stellar Dragon.
Those Primordial Stellar Dragons were in fear and trepidation. They knew that Ye Qing's intention was to take their blood essence. The problem was that they didn't defend, and the saber couldn't hurt them. This was very awkward.
"What are you still standing there for?
Spit out a mouthful of blood essence! "Ye Qing ordered again.
The nine Primordial Stellar Dragons' faces darkened. They were speechless. Spit out a mouthful of blood essence?
This was the first time they heard such a strange request.