Du Feng's consideration was very realistic because everyone would come in sooner or later. They were still looking for opportunities outside the Wall of Sighs. Some were busy reincarnating, and some were looking for things. When their Cultivation was revived, they would definitely enter the Wall of Sighs.
In fact, Du Feng had also thought about whether he could use the storage ring to bring back some Sighing Soil, or simply put it in his pocket. However, the storage ring couldn't fit it at all. If it was put in his pocket, it would leak out and tear his clothes.
This thing could either be held in his hand or stored in the small world of the necklace. In fact, it was useless to hold it in his hand. When he left the Wall of Sighs, it would automatically be taken back. Only the part that entered the small world of the necklace could be used effectively.
Others were looking for treasures outside the Wall of Sighs, but Du Feng was looking for things inside the Wall of Sighs. For the two of them, the herbs, spirit fruits, and weapons were not important. Because any fruit was as useful as the fruit of the void creatures. With the Sighing Soil, there was no need to worry about it not bearing fruit.
In terms of weapons, Du Feng also used second-stage geng metal, which had been upgraded to a supreme-grade spiritual treasure. Its effect was comparable to that of a primordial spiritual treasure. The only problem was that it couldn't be used in the endless void. Because only true primordial spiritual treasures could be freely manipulated in the infinite void.
Although supreme-grade spiritual treasures were comparable to primordial spiritual treasures in terms of sharpness, hardness, and other aspects, they were still not true primordial spiritual treasures. If he wanted to find a true primordial spiritual treasure, Du Feng believed that there would be a greater chance inside the Wall of Sighs than outside.
Oh right, he suddenly remembered something. It was his Myriad Sword Gourd. Although the gourd had been picked, it was still a plant in essence. The Sighing Soil was effective on plants, but would it be effective on the Myriad Sword Gourd? If it was effective, could it also be upgraded to a supreme-grade spiritual treasure? Then, he wouldn't have to go around sucking blood.
Once the Myriad Sword Gourd was successfully upgraded, it would also be of great benefit to the Broken Blood Flying Sword soaked in it. Because the level of this weapon hadn't kept up, it wasn't very useful in combat. Most of the time, it was just for convenience. It would be great if it could be upgraded.
Du Feng's idea was good, but he didn't dare to try it easily. This was because all the plants planted before, except for the branch, had been burned to ashes. If he buried the Thousand Sword Gourd, would it also turn into a pile of ash?
He thought about it. Nothing ventured, nothing gained. He had to take a risk and give it a try. For the sake of safety, it was better to take out the Blood Splitting Flying Swords for now. Even if the Ten Thousand Sword Gourd was destroyed, at least the Blood Severing Flying Swords were saved.
This time, he did not dig a hole to bury the Thousand Sword Gourd. Instead, he used a different method. He picked up a small handful of Sighing Soil from the ground and sprinkled it lightly on the Thousand Sword Gourd to see its reaction.
"Sizzle …"
As a result, this small handful of Sighing Soil caused the surface of the Myriad Sword Gourd to smoke. Fortunately, there was only a small amount of it, so it did not burn. After the dust settled, a burn mark could be seen on the surface of the Thousand Sword Gourd.
Just as Du Feng was feeling distressed, he saw that the dent began to bulge slowly, like a dry sponge soaked in water. It bulged even more than the other parts.
Interesting, I thought the Thousand Swords Gourd was burnt. I didn't expect it to be upgraded after that. It was mainly because Du Feng controlled the amount well and didn't destroy the Thousand Sword Gourd to the point of irreparable damage. This was like the human body. Doing the right amount of exercise could strengthen one's physique, but if one practiced too much, they would die of exhaustion.
After the dent on the Thousand Sword Gourd bulged, Du Feng sprinkled a small handful of Sighing Soil on it again, this time in another place.
"Sizzle …"
There was a sizzling sound coming from the Thousand Sword Gourd, like a red-hot iron being burned on pig skin, and there was a burst of gray smoke. To be safe, Du Feng stopped and continued to observe. He saw that the surface of the Thousand Sword Gourd had indeed been burned, and there was another dent. But it didn't matter. This dent was like a sponge soaked in water, and it slowly bulged again.
Interesting, it seemed to work.
Seeing that both parts of the Thousand Sword Gourd bulged, and the texture became harder and more lustrous, Du Feng was filled with information about this upgrade. Coming to the Lost Land was really not in vain. Just these few things alone had already made a profit. Thinking of this, he pinched a small handful of Sighing Soil.
He controlled the amount every time and sprinkled it very evenly. After a while, all the places on the Thousand Sword Gourd bulged, and the entire gourd was a circle bigger, and it was a little shiny purple.
Hahaha, really wearing out iron shoes in fruitless search, only to find it by chance. Previously, in order to upgrade the Thousand Sword Gourd, he really flew a lot and let it absorb the blood of demonic beasts. But to upgrade a supreme-grade spirit treasure, it needed to absorb the blood of a peak level-20 demonic beast.
A peak level-20 demonic beast was equivalent to a human Rank Eight or Nine Rings Immortal Emperor. It was not easy to find and kill.
Originally, he was worried about the Thousand Sword Gourd's upgrade, but he did not expect that playing with soil in the Lost Land today would let the Thousand Sword Gourd successfully upgrade.
Du Feng repeatedly touched and pinched it left and right, confirming that the Thousand Sword Gourd had indeed been upgraded to the supreme-grade spirit treasure level. The blood contained inside began to boil, as if it had been reborn. He hurriedly stuffed the Blood Breaking Flying Swords back. He believed that after a period of soaking, these Blood Breaking Flying Swords could be upgraded to the supreme-grade spirit treasure level.
Thinking about it, it was actually quite unfair. The Dragon Riding Sword had the swordsman and the dragon soul, and it consumed so many rank two to cultivate to its current level. With such a large pile of Blood Breaking Flying Swords soaking in the gourd, they could actually reach the same level as it.
However, there was no absolute fairness in the world, not to mention that these were all Du Feng's things, so he would not lose out even if they were upgraded.
After the Thousand Sword Gourd was upgraded to a supreme-grade spirit treasure, Du Feng grabbed some Sighing Soil and tried it again, but it did not have any effect this time. It would not spread, it would not burn, there would be no dents, no bulges, no bulges would not be upgraded.
In fact, he had reason to believe that if the Thousand Sword Gourd was buried in the Sighing Soil for a long time, it might really become a Connate spirit treasure one day. However, he could not take that risk, and he did not have that much time. Instead of burying the Thousand Sword Gourd, it was better to go to those ruins and rummage, maybe he could find something good.
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