On the surrounding rock walls, there are some feces attached to them, and the rancid smell is from those feces.

These should be the feces of some demon bats, could it be that this is the lair of demon bats?

If this is their lair, then there is a reason for people to come to harass them every night, it is the Heavenly Sword Sect that occupies people's nests, and it is not right if people don't come to make trouble.

However, then Dong Lin realized a problem, why can't you see a single demon bat here?

And the deeper you go into the crypt, the lower the temperature around you, and a cold and yin aura keeps coming out of the depths of the crypt.

This is a Yin vein! Or more accurately, the fire vein is a cold vein, and the quality is quite good!

Dong Lin was overjoyed, someone would send a pillow when he was really sleepy!

Dong Lin had already gathered all the materials for the Northern Underworld Water Sword, and what he was waiting for was to forge the second spirit sword.

However, the North Stygian Water Sword is not so easy to exercise, and this magic weapon with an extremely cold attribute requires a special environment to be forged, that is, a high-quality cold vein.

The higher the quality of the cold vein, the greater the initial power of the Northern Stygian Water Sword, because throughout the forging process, it is necessary to obtain enough cold qi from all around.

The amount of cold qi absorbed in this process is very large, and the speed of the general cold vein supply cannot keep up, which is likely to affect the quality of the Beishenkan Water Sword, since it is to be used as a natal magic weapon, then the best must be used, which is also a major reason why Dong Lin gathered the materials, but did not do it for a long time.

Dong Lin always felt that something good would happen when he went south, but he didn't expect it to be a high-quality cold vein, and the joy in his heart couldn't be mentioned.

Sure enough, in the deepest part of the cave, a small cave with a slow cold air was found, and the surrounding area was completely a world of ice condensation, and as soon as Dong Lin stepped into the range, he had a feeling that his blood was frozen by ice.

If it weren't for the fact that Nan Ming's Fire Sword was independently supporting and exuding blazing heat and driving away the cold qi, Dong Lin's cultivation in the Peiyuan period alone would be completely an act of seeking death by approaching this extremely cold vein.

Nan Mingli's fire sword hung in the air on its own, and Dong Lin took out various materials and began to forge it according to the refining method.

In fact, the key to the refining of the North Stygian Water Sword is the cold vein, as long as the cold qi in the cold vein is sufficient, the Water Dream Divine Stone will be activated, turning into a mass of liquid that can be controlled by the spiritual sense, as if alive, devouring and fusing all the materials one by one.

This is also the key to the fact that ordinary people can't see the strangeness of the Water Dream God Stone, as long as they don't encounter the extremely cold aura, there is no reaction to any spiritual power, and there is a stubborn stone.

After devouring, it is shaping, this process is the most cumbersome, equivalent to carving a magic circle in a mass of liquid, the difficulty can be imagined, but for Dong Lin, who is in a very high state of mind, this is not a problem, once he enters the realm of the unity of heaven and man, no matter how difficult the divine sense control is, it is only a matter of time for Dong Lin.

Dong Lin's entry into the meditation was two days of hard work, and when he opened his eyes again, there was already an azure blue ripple long sword in his hand, the water magic weapon in the Five Elements Sword Array, the Bei Yingkan Water Sword.

During this period, the Water Dream Divine Stone absorbed a large amount of cold energy, but after turning into the Northern Immortal Water Sword, Dong Lin didn't feel a little cold, only when Dong Lin's spiritual power was input into the sword body, the cold energy that seemed to be able to freeze everything would be shown again, and its coldness was even above the Jade Shuzi Magic Weapon Qing Shark Sword.

The aura emitted by the Bei Yingkan Water Sword is only the level of the Huang Pin Spirit Weapon, but this is also much better than when the Nan Ming Fire Sword was first refined, Dong Lin was very satisfied, and still collected his own dantian to recuperate.

When Dong Lin left the crypt, Nan Ming returned to the dantian from the fire sword, and the two mini swords were in Dong Lin's dantian, one red and one basket rotated around on their own, and there was a faint feeling of compatibility between water and fire, as for the reason, Dong Lin couldn't understand it for the time being.

Dong Lin was overjoyed, but he did not forget his original intention and continued to look for the lair of the Ice and Fire Sound Bat.

In fact, in the crypt, Dong Lin already vaguely knew why the Ice and Fire Sound Bat attacked the Quiet Valley again and again, it was because of the existence of the cold vein, Dong Lin suspected that the Ice and Fire Sound Bat was cultivating with the help of the cold vein or something, so could it be that the old nest was near the fire vein?

Looking for spiritual veins and various earth veins, there are special magic weapons, Dong Lin does not have them on hand, however, Dong Lin's Nanming Lihuo Sword seems to be more sensitive to the fire veins, and the last time he was in the Fire Dragon Lizard, Nan Mingli had an abnormal reaction from the Fire Sword.

Dong Lin flew cautiously along the way, after all, it was already a demon beast rampant Tianling Mountain Range, once it attracted the attention of some five or six level demon beasts, even if Dong Lin had more hole cards, he would not be able to eat and walk around.

Carefully avoiding a few demon beast groups, Dong Lin finally had a little abnormality in his heart, Nan Ming stopped turning from the fire sword, and instead pointed diagonally to the southeast.

Dong Lin's divine sense swept away, it was also a small mountain, and there were no demon beasts entrenched.

This made Dong Lin basically confirm that it was the hiding place of the Ice and Fire Sound Bat, and almost every hill in the Tianling Mountain Range had a group of demon beasts, or some kind of powerful demon beast sitting on it, which was a concept of territory, just like the truth that one mountain could not contain two tigers.

Dong Lin quickly flew towards the hill, and sure enough, not a single demon beast was found on the way, and the aura on this hill was considered to be the best within a radius of several hundred miles, which made Dong Lin even more confirmed that there must be some cave nest in this hill.

After sparing Xiaoshan and checking it for a week, Dong Lin really found a huge hole, and the unique smell of ice and fire sound bats was faintly emanated, and Dong Lin used a concealment spell to carefully enter the cave.

Dong Lin was pondering all the way how to deal with this group of ice and fire sound bats, it seems that it is not enough to rely on his own strength, the best way is to let the sword cultivators of the Heavenly Sword Sect come over to deal with it, and sit on the mountain to watch the tiger fight, if he can reap some more benefits from the fisherman, it will be the best.

Dong Lin hesitated whether to go back, and felt a little unwilling, so he finally came and returned empty-handed, which was not Dong Lin's style, so Dong Lin took the risk of using the method of concealment into the cave.

Speaking of which, Dong Lin's set of concealment spells obtained from the Nanyang Han family is really very good, and with the qi collection effect of the Daodian, he walked over under the nose of the demon bat, and the other party did not react.

Of course, this also has a lot to do with the fact that the demon bats are born with poor eyesight, as long as Dong Lin doesn't make any movement and walks over with hip-hop dancing.

Dong Lin walked all the way, the more careful he went, the entire cave wall was full of demon bats, densely packed, with grades ranging from level two to three or four, and the more he went into the cave, the higher the temperature, the higher the level of demon bats.

There are at least tens of thousands, or even millions! This feeling of being a thief, Dong Lin felt very excited, and at the same time he still cautiously groped forward, not daring to be careless, even the spirit rune given by Gu Hong had been realized and prepared, and if there was a slight mistake, he would immediately throw the talisman and leave, blow him up, and escape while the chaos.

But fortunately, there was no danger along the way, and those demon bats seemed to be sleeping, even if two giant bats with a fifth-level peak appeared in the depths, they didn't find Dong Lin's existence.

The two giant bats were like two upside-down door gods, hanging in front of a small cave, this was the only passage to the fire vein, Dong Lin had already walked here, and he was a little unwilling to go back, so he decided to take a risk and pass through the gap between the giant bats little by little.

Dong Lin's courage is really big, and the gap is only as wide as one person, in order not to alarm the two demon bat gods, Dong Lin had to collapse his chest and abdomen, lean sideways, and move towards the entrance of the cave little by little.

Faced with the existence of the two Jindan periods, Dong Lin regretted moving into the middle, if this was discovered, it would really be eaten alive in the mouth, this nervousness made a mistake, his feet trembled, and he accidentally kicked a small pebble down.

With a clinking sound, the giant demon bat in front of him suddenly opened his eyes, and just met Dong Lin's gaze, Dong Lin felt a bone-chilling air rising from the bottom of his heart, and the whole person suddenly became wooden.