The spirit existed only to accomplish his mission. So, giving those treasures to the chosen one didn't go against it. That is why he decided to accept the oath. Moreover, he was curious to know the reason behind Yun Chen's behaviour.
«..aiya! Alright!
I TAKE THE HEAVENS AND EARTH AS A WITNESS, AND SWEAR ON THE SOUL OF THE VOID DIVINE BEAST, TO BE THE PROMISE MADE TO THE CHOSEN ONE YUN CHEN. IF I EVER GO AGAINST THIS OATH, MY SOUL WILL NEVER GO INTO REINCARNATION AND WILL BE DESTROYED BY THE HEAVENLY LIGHTNING! » the spirit declared.
After it finished, the golden word oath appeared in front of the little ball of light and then disappeared.
«Now, the oath is done! You can show me your element, right? » said the spirit.
«Yes! Take a good look! » Yun Chen said before manifesting the wind element.
«Oh! So, you have the wind element spirit root! Then, the chaos wind orb is suitable for you. » the spirit said before sending the box containing the Chaos wind orb to Yun Chen.
«Now, it is tim…. » said the spirit.
«Hold on! We haven't finished with the treasures yet. » Yun Chen before creating a short earth wall with some vine surrounding it.
«Thi…this! How? You have three elements? » asked the shocked spirit.
«Yes! And now, I can have the other two treasures, right? » Yun Chen said while smiling slyly.
«Tch! No wonder you wanted me to make an oath. It is not a problem, can have it. » said the spirit before sending the two other boxes.
«Now, I will give this token to you! I added another function to it so that you can come to this secret realm wherever you are, and you will not be limited by your cultivation. It also opens the dimension where the four divine beasts are sealed but you won't be able to open it now since you don't have enough qi. You must be at least at the peak innate realm to do so. Now, you can leave the temple. » said the spirit.
«There is still something that I want to ask. » Yun Chen said suddenly.
«Hm? What is it? » the spirit asked with curiosity.
«Since, this is where the Void divine beast died, there should at least be a corpse left, right? » Yun Chen asked.
Yun Chen already possessed the bloodline of the Void divine beast. If he were to have its corpse, he would be able to complete the last divine bloodline. So, he didn't want to miss this opportunity.
«No, there is no corpse left. The void beast used his own body and the some blood from the four other divine beasts to create this realm. The only thing left from his body is a pool of blood. It is called the Void blood pool, but it doesn't have any use. » the spirit explained to Yun Chen.
«Senior, I have some use for this pool! Can you, please, lead me there? » Yun Chen asked politely.
«If it has some use for you, then it is better. I will take you there! » the spirit said before flying toward Yun Chen.
The spirit stopped over Yun Chen's head and his light enveloped Yun Chen before they both disappeared. The next moment, Yun Chen noticed that he had been teleported inside a large underground cave.
« We are in a cave under the temple. The Void blood pool is just ahead. » the spirit said after coming to the cave.
Yun Chen walked for about five minutes before reaching a pond containing a golden liquid where he stopped.
«This is the Void blood pool and the golden liquid you are seeing is the blood of the Void divine beast. » the spirit described.
«Why is his blood golden? » Yun Chen asked after seeing the blood.
«I don't know! He was born with this blood. » answered the spirit.
After that, Yun Chen didn't ask anything else. He took off of his clothes, entered the pond and walked to the center before sitting there cross-legged and meditating.
«This blood is very good to refine the body. But before that, I will complete my void beast bloodline. It is the most important thing. » Yun Chen though to himself when he was inside the pond.
Yun Chen first absorbed a part of the blood using his "Drain" ability. He tried to purify it or extract the bloodline from it but nothing happened which means it was the purest blood from the Void divine beast and he could integrate it directly.
After two days, Yun Chen completed the Void beast bloodline. Now, all the divine bloodlines are completed no one in this world could match his potential and talent.
«There is still about half a month left before the secret realm close. I will use this time to refine my body here. » Yun Chen said to himself.
When Yun Chen began refining his body, some things appeared in his mind. They were the knowledge of the Void divine beast. There were a lot of techniques related to the Void beast bloodline and some knowledges on high-level formations that Yun Chen never saw in his previous life. Yun Chen refined his body inside the blood pool for about two weeks while browsing through these knowledges until he reached the improvement limit of his body. His physical strength also skyrocketed and is comparable to the peak of the innate realm.
After finishing cultivating and observing the golden blood around him for a while, Yun Chen didn't want it to go to waste.
«If only I could take it out, it will be very good! » Yun Chen unconsciously said out.
«You can take it out! Take this! » the voice of the spirit echoed on the other side of the pond.
The spirit gave him a weird bottle colored in red and green.
«What is this? » Yun Chen asked
«It is a fountain bottle! It can carry a large amount of liquid inside. You can take a part of the blood with you since the space inside is not enough to take all the blood. » the spirit explained.
«Thank you senior! » Yun Chen thanked him politely before sucking most of the blood in the bottle. The blood left in the pond was about one fifth of the total.
While refining his body with the blood, Yun Chen noticed that there was a special qi contained in that blood that was different from the devil qi and the true qi. It was also this qi that was protecting the Void divine beast. At that moment, a bold idea crossed Yun Chen's mind.
«If this qi can restrain the devil qi, I don't know what will happen if it is fused with the devil qi! » Yun Chen said to himself.
Since there was some blood left, Yun Chen tried to use it to verify his hypothesis. He sat cross-legged and used his soul power to pour that qi directly inside the devil qi dantian. When it encountered the devil qi, they didn't repel themselves, but the special qi washed away the murderous inside the devil qi. The bloody red devil qi's color changed progressively and after Yun Chen washed all the devil qi inside his body, it became golden red. Even the devil qi dantian became golden red and the devil spirit root mutated. This mutated spirit root can wash the murderous intent in the devil qi by itself and the previous bloody red symbol that appeared on his forehead became golden red before disappearing.
The whole washing process took a total of three day to Yun Chen and Yun Chen brokethrough to the fourth layer of spirit-gathering realm during that process. He was now ready to leave the secret realm. The spirit teleported Yun Chen directly on the altar at the border of the lake. When Yun Chen looked back at the central island, the temple and the spirit had disappeared and only the island was left behind.