Zhang Ling continued to descend, reaching over three hundred zhang(丈: zhang, a unit of length). His divine sense observed some blue glowing stones of varying sizes on the nearby dark cyan cliff face. They looked very much like spirit stones, attracting his attention. With a flash of spiritual light in his hand, a yellow blade of energy was unleashed, causing earth and rocks to fly everywhere. A blue stone, about the size of a fist, flew into his hand. After examining it carefully and using his divine sense to check it twice, Zhang Ling threw the blue stone away, no longer paying attention to it. It was just ordinary fluorite, considered a rare gem in the mortal world, but useless to cultivators. Soon he descended to over four hundred zhang(丈: zhang, a unit of length) underground. The blue stones on both sides of the rock walls became more and more numerous, radiating light, creating a unique scene. At this point, he stood on the ground, seemingly having reached the bottom. A sweep of his divine sense revealed nothing but glowing stones. The surroundings were as dark as ink. Looking up, he could only see some faint light and shadows. Releasing his divine sense, the situation within sixty zhang(丈: zhang, a unit of length) around him was mapped into his mind. The yin wind(阴风: yin wind, a cold and malevolent wind) raged in this place, greatly affecting his divine sense. Zhang Ling took out a moonstone and threw it forward, the white light illuminating a patch of the area ahead.
The yin wind(阴风: yin wind, a cold and malevolent wind) intensified, causing the red light罩(光罩: light shield) around him to deform slightly. Zhang Ling frowned and pointed at the fiery red orb floating beside him, making the red light罩(光罩: light shield) around him even thicker. Then, he patted his storage bag and took out two top-grade magic tools, the Flying Spirit Shield and the Cicada Wing Sword. With his early Foundation Establishment cultivation, he could unleash the full power of these two magic tools. Suddenly, he heard two strange "squeak squeak" sounds. Zhang Ling remained motionless. The flying sword turned, and the thin flying sword swayed, slashing out with a sword. In the air several zhang(丈: zhang, a unit of length) away from him, a gray bat with hardly any hair trembled and was cut in half by his sword light, its corpse falling to the ground. This was a cave bat, with a pair of large wings, and its strength was at the mid-stage of the first order when he scanned it with his divine sense earlier. Then, Zhang Ling cast a spell, and several pale white spiritual powers flew from his hand, drifting towards the surroundings. Standing in place and waiting for a few breaths of time, Zhang Ling withdrew these spiritual powers and headed in one direction. These spiritual powers were a means of the Condensing Spirit Art, used by him to explore places with dense yin energy(阴气: yin energy, negative energy). The White Bone Yin Fire that Wei Shen was looking for was a cold-attribute yin fire(阴火: yin fire, a type of ghostly fire). This kind of yin fire(阴火: yin fire, a type of ghostly fire) was somewhat powerful, and some could form in ordinary yin evil(阴煞: yin evil, negative and evil) places after hundreds of years. For the next two hours, he searched for places with dense yin energy(阴气: yin energy, negative energy), killing several cave bats along the way. The underground space was very large, and there were also large and small cracks here. This place was full of rocks, and the large and small gray stones made the terrain extremely complex. There were also some glowing ferns around. Suddenly, his divine sense discovered a gray-white whirlwind, rapidly attacking in his direction. Looking closely, Zhang Ling frowned! The white thing was not a whirlwind at all, but a dense swarm of gray-white moths gathered together. Each of these moths was the size of a fist, with a layer of gray-white spiritual light on its body, and a pair of fangs in its mouth looked ferocious. This was also a kind of dark insect. As soon as Zhang Ling discovered these moths, he immediately activated the Hidden Spirit Art to suppress his own aura to the lowest level, and then quickly ran in the opposite direction. Although these moths were not strong, Wei Shen only gave him one day, and he didn't want to get entangled with these flying insects. He used the Condensing Spirit Art from time to time to explore places with dense yin energy(阴气: yin energy, negative energy), while concealing his movements.
After another three hours, Zhang Ling stopped, looking at a dry corpse of a demonic beast on the ground, his face darkened. The corpse under his feet looked like a wolf-shaped beast, more than a zhang(丈: zhang, a unit of length) long, several times larger than ordinary beasts. There was no vitality on this beast. Zhang Ling squatted down and observed the corpse for a while. This beast had fine gray-green fluff more than an inch long on its body, which was unusually sharp. The exposed skin could see shriveled gray-black flesh. On the head of the demonic beast, a mouth of uneven sharp teeth was also exposed. A pair of gray-white shriveled eyeballs could be vaguely seen in the dark eye sockets. This should be a demonic beast zombie. After humans and demonic beasts die, their corpses may form this kind of monster in specific environments. Yin evil(阴煞: yin evil, negative and evil) places are this kind of place. Zombies are corpses that have become psychic and regained the ability to move. Low-level zombies have no consciousness and can only be called corpse monsters. Looking at this monster, it used to be a demonic beast, otherwise it wouldn't have this kind of size. Just now, this wolf-shaped corpse monster's strength was around the late stage of Qi Refining, which can only be regarded as a low-level zombie. However, when he killed this corpse monster just now, he drove the flying sword to strike several times before breaking through the wolf-shaped corpse monster's defense. Its body was extremely hard, comparable to a middle-grade magic tool. This is the characteristic of zombies, a hard body. In the following hour, he encountered several more corpse monsters, but their strength was even lower, and he solved them with one sword. On the contrary, occasionally other demonic beasts were a bit troublesome. In addition to moths and cave bats, he also discovered a kind of black snake demonic beast, which also had late-stage first-order strength. He had been wandering here for most of the day. This place was intricate and complex. Due to the existence of yin wind(阴风: yin wind, a cold and malevolent wind), one might get lost if they were not careful. If it weren't for the fact that he used the Condensing Spirit Art every once in a while to detect that the surrounding yin energy(阴气: yin energy, negative energy) was getting stronger and stronger, he would have been lost. Soon after, he discovered an underground stone cave. The entrance was small and somewhat narrow, but the yin energy(阴气: yin energy, negative energy) inside was dense. After thinking for a moment, he decided to go in and take a look. As soon as Zhang Ling entered the cave, a pale and terrifying face appeared in front of him, and a cyan-white claw grabbed towards him. The Cicada Wing Sword in front of him swayed without thinking, throwing out three sword lights, cutting the monster in front of him into several pieces. Zhang Ling took a closer look and found that this was a humanoid corpse monster. Upon closer inspection, there were still some scraps of cloth on the corpse. It was not hard to imagine that this corpse monster was a person before his death. This was hundreds of zhang(丈: zhang, a unit of length) underground, how could anyone come here, Zhang Ling felt puzzled. Could it be that this person was a cultivator before his death? He searched the corpse monster, but found nothing unique to cultivators. Ordinary people cannot come here, but he still walked towards the cave. As he went deeper, he killed several more corpse monsters. Among them, there were beasts and two corpse monsters that were transformed from human deaths. His heart was full of doubts. The strength of the demonic beasts and corpse monsters here was only at the level of Qi Refining cultivators. Although there was endless yin wind(阴风: yin wind, a cold and malevolent wind) raging here, it was not difficult for Foundation Establishment cultivators to enter. Wei Shen was a fake Dan(丹: Dan, Pill) with the peak of Foundation Establishment strength. It was easy to enter this place with this strength, so why did he let him down? Was he really here to find the White Bone Yin Fire? If this person had already been here, if the White Bone Yin Fire had really been generated here, I am afraid that he would have obtained it long ago. He couldn't figure it out. Suddenly, light and shadows flickered ahead, and Zhang Ling's divine sense quickly checked forward. He saw that the space in front of him suddenly opened up, and he came to a very large underground cave, surrounded by a layer of emerald green light and shadow. The yin energy(阴气: yin energy, negative energy) here was two or three times denser than outside, and the source of the light and shadow was a group of emerald green ghost fires, with as many as thirty or forty clusters at a glance.
Strangely, these ghost fires were mostly surrounding a strange tree. The tree was not tall, only two zhang(丈: zhang, a unit of length) high, and the trunk was as thick as one person could hug. It grew crookedly. What surprised him even more was that the strange tree was gray-white all over, covered with thin branches, and was a strange willow tree. The branches on it were dark green, and they waved gently without wind, as if they were alive. Suddenly, Zhang Ling discovered that in the heart of the willow tree, a cluster of fist-sized, pale white flames was floating on a branch. The cluster of white flames turned into a cloud of white mist and floated to another place, and then condensed into a flame shape again. Then, it swayed to the other side of the willow tree, looking quite agile. "White Bone Yin Fire" Dong, sound of a thump!