When Yun Chen entered the private seclusion room, he was very surprised. Inside that room, there were all kind of pills from the first grade to the fifth grade arranged on a shelf. There were also all kind of rare treasure herbs and elixirs on another shelf in the room. Yun Chen began screening the other shelf. But while doing that, his eyes fell on box made from dark iron. In itself, the dark iron is not a precious materiel but one of his properties is that it is impervious to the six elements.
«If they even used the dark iron, that means the thing inside must be very special. » Yun Chen said while taking the box.
Yun Chen took the box and carefully opened it. Inside the box, the was a transparent bottle sealed with a special formation. There was a viscous silver liquid the size of five drops floating inside it.
«This..this is the UNIVERSE MERGING FLUID! » Yun Chen though to himself.
The universe merging fluid is a heavenly treasure which take a two thousand years to condense a drop. And it can condense only where the six elements are balanced all the time which is almost non-existent. This liquid has three usages; it can store and gradually improve the grade of any weapon or armor. The most important is that it can fuse with the human flesh and connect itself with the blood vessels and vital points.
«By using this, even if one die, his weapons can't be snatched if it is not by his or her own will. I don't need it but it will be perfect for what I am about to do. Moreover, the seal on the bottle had been made using ancient runes. So, it is impossible know how to decipher it if you are not a high-level formation master. That is why it was still sealed. But for me, it is a piece of cake to break it! » Yun Chen declared.
Yun Chen took away the box some other materials. He didn't touch the pills since they were of no use to him. He then headed to the back of the room and sat cross-legged.
«Ling'er will be departing soon. And where she is going, if you don't have at least a medium grade earth weapon, you can't call yourself a genius. So, I must make something that can protect her when I am not around. This time, I will craft a heaven tier weapon! » Yun Chen though to himself.
The crafting process between an earth tier weapon and a heaven tier are very different. Not only the fire used to craft it must be a heavenly fire, but the weapon must also go through the heavenly lightning in order to absorb its heavenly energy. But, if it can't withstand the lightning impacts, the weapon will be destroyed on the spot.
«I must first upgrade the Yin-Yang fire to a heavenly fire. » Yun Chen said before taking out thirty-eight bottles with different sparkling fires floating inside each one. Using his soul power, Yun Chen crushed all the bottles in one fell swoop leaving only the fire floating in the air around him. He then absorbed them using his "Drain" ability. After absorbing the fires in the special space, Yun Chen summoned the Yin-Yang fire there. One by one the fires were dissolved inside the Yin-Yang fire and its aura became more stronger each time. It absorbed all the thirty-eight fires, and it can even be compared to the first fire on the earth fire list. However, it was not enough to make it breakthrough to the heavenly level.
«Since it can't swallow a fire above its level, the only ones left are the Soul-extinguishing fire and the Three-colored pole fire. I will let the Yin-Yang fire swallow them together. » Yun Chen after some reflexion.
Yun Chen used his soul power to compress the two fires together and directed it toward the Yin-Yang fire. After devouring it, the Yin-Yang fire began to weaken. Seeing that, Yun Chen was very confused and worried but remained calm. A quarter of an hour later, the Yin-Yang fire aura skyrocketed at an astonishing speed and began to emit streams of heavenly aura witch was the unique characteristic of a heavenly fire.
«It finally reached the heavenly level. After stabilizing it, I will feed it the heavenly fires. Oh, yes! Talking about heavenly, it may be possible for me to extract the phoenix's undying fire from the undying fire ore» Yun Chen declared before taking out a big bright scarlet crystal the size of three adult human heads.
«I don't need a lot of it to make Ling'er weapons. I will take a part of it and extract the undying fire from it. » Yun Chen said and then took out one of his daggers. He tried to slice the undying fire ore but it only left some marks. It took four hours to Yun Chen to cut away a part the size of his fist. But this was largely enough for him. He then absorbed that piece of crystal and tried to extract the fire inside it after purifying it. Surprisingly, eight strand of undying fire were extracted from that piece.
«Now that the Yin-Yang fire is stabilized, I will make it swallow a strand of undying fire. I can merge the other strands together. It won't be difficult since it is the same fire. » Yun Chen though to himself.
Yun Chen put seven strands of the undying fire together and they merged without much effort but the energy inside it was still weak and if it stays like that, it will dissipate within a day.
«I will use the heavenly aura spread by the Yin-Yang fire to nourish it. With that, it can last at least a week. If Ling'er want to breakthrough to the foundation-building realm, she will need a fire and the phoenix's undying fire is the best match. » said Yun Chen before condensing the heavenly aura.
Yun Chen guided that aura inside the undying fire and then sealed the fire inside a special bottle with numerous formations on it. Following that, the Yin-Yang fire absorbed the last strand of undying fire in addition to the Sky-breaking fire and the Holy spirit lotus fire. Now, the Yin-Ying can be ranked in the top ten of the heavenly fire list.
Since Yun Chen entered seclusion, a day and a half had passed. After upgrading his fire, he didn't began crafting directly. He took half a day to complete an ancient rune formation on a jade plate. It would only need to be fed enough true qi to be activated successfully.
«The lightning converting formation need a huge amount of true qi, but I don't have enough since my cultivation is too weak. I will need sister Meili's help for that. Now, it is time to craft some weapons for Ling'er. » Yun Chen though to himself.
After thinking that, Yun Chen took out a lot of materials from his space-ring. From those materials, the most important were the Undying fire ore, forty medium grade spirit stones, five high grade spirit stones, ten emperor's essence crystal, a bottle of blood essence from a nine-headed hydra, a bottle of heavenly dew, two pieces of gold true essence, a bottle of the heart blood from the transformation realm black flame salamander, three pieces of soul-refining stone, three stalks of bloodline enhancing flower, dozens of demon cores from fire attribute demon beasts. There were even some bones and skin from avatar realm demon beast of the fire attribute.
« Ling'er learned how to use various types of weapons, but I noticed that she is proficient with four weapons which are the sword, the whip, the bow and the spear. For the sword and the whip, it can be replaced by a sword-whip. She will also need a sturdy and light armor to protect her whole body. To resume, I will craft an armor, a sword-whip, a bow and a spear. » Yun Chen said after thinking for some time.
Yun Chen took out his SUN AND MOON HEART FURNACE, and a stone puppet that was the doppelganger of Su Ling. The Sun and Moon heart furnace already contained different mould of different weapons so, Yun Chen only needed the materials to craft them.
«I will begin with the armor since it is the most complicated part. But before that, I must use the concealing formation to hide from the heavenly lightning. The weapons and the armor must past the heavenly lightning at the same time, so I must not be disturbed in the middle. » Yun Chen said before standing up.
Yun Chen began making some hand signs and pronounces some spells in an ancient language. After finishing, a white boundary covered the whole Yun family mansion, but it didn't restrict anyone from entering or exiting the mansion. Now, Yun Chen could concentrate on the crafting of the weapons and the armor without fearing the heavenly lightning.