In the blink of an eye, Ye Tian had already been at the Heavenly Medicine Peak for more than half a month. With the dense Qi of the Heavenly Medicine Peak and the mountain of spirit stones in his storage ring, Ye Tian's dantian was finally filled.

With a crisp "bo" sound, Ye Tian's Purple Flood Conjuration had naturally broken through to the fourth circulation.

"Phew!" Ye Tian let out a long breath. After breaking through to the fourth circulation, Ye Tian discovered that his spiritual energy capacity had more than doubled compared to before, and his meridians were more resilient.

After breaking through, Ye Tian felt refreshed. Ye Tian even had a feeling that he wanted to fight with someone.

During this time, Ye Tian spent most of his time cultivating in the cave and rarely went out. When Chu Jingtian heard that Ye Tian had already advanced to the Heavenly Medicine Mountain to visit the Heavenly Medicine Peak for the night, the two of them chatted happily.

Initially, during the first few days, Ning Xue would head over to where Ye Tian Ye was. However, for the past ten days, she didn't know why she didn't go over to his place anymore. Ye Tian didn't know why he actually missed Ning Xue. "It can't be that I like Ning Xue, right? Aiya, forget it, let's go out for a walk. I want some fresh air." Ye Tian shook his head hard to dispel the ridiculous thoughts in his head.

Ye Tian walked out of the cave and headed towards the main hall on the mountain peak. He was planning to pay respects to Yao Lao and ask him about his cultivation.

Because he could practice the Heaven Flame Seal when he broke through to the Fourth Cycle of the Purple Flood Mantra, but to practice the Heaven Flame Seal, he needed to have a strong fire essence. Therefore, he wanted to ask Yao Lao where he could get the fire essence.

Ever since the old man first came to the Heavenly Medicine Mountain and told him about the rules of the Heavenly Medicine Mountain and gave him two jade slips, he didn't look for him again.

"It was as if he had forgotten about this disciple of his." "Aiya, Ning Xue, how did you manage to find such an unscrupulous master for me?" Ye Tian Yun pondered as he walked.

Ye Tian went straight to the backyard of the main hall. He saw Yao Lao was concocting pills in the pill room, so he asked the boy at the door to pass on the message. He himself waited at the door.

In a while, the child came out to let Ye Tian enter. When Ye Tian entered the pill room, he found that the interior was unbearably hot. A huge pill furnace was placed in the middle with a red body, as if it could melt everything. The old man was sitting cross-legged next to the pill furnace, meditating on some herbs.

"Ye Tian, you're here. Come here." Yao Lao said without turning his head around.

"Master, I have something that I would like to ask you. I didn't disturb you from refining the pill, did I?" Ye Tian stood behind Yao Lao and bowed as he spoke.

"It's alright. Come over and take a seat. I'll give you some common knowledge on pill refining as well. By the way, have you seen the jade chip I gave you last time?" Yao Lao said with a smile.

Ye Tian Ying sat beside Yao Lao and then replied respectfully, "I have read the records of heavenly medicine that master gave to disciple, and disciple has also memorized some things related to it. However, this book's contents are still not as good as practice, so disciple is prepared to learn some things related to medicinal pills from master. As for the other Supreme Mystery Sect's basic methods, disciples are too busy cultivating and haven't had the time to read them in detail."

Hmm, I am naturally very satisfied that you have this kind of intention. Whenever you want to learn it, I will teach it to you without reservation. As for those basic arts, if you feel that it's necessary, then you can practice it. Yao Lao said to Ye Tian with a smile.

"Hehe! Master, you don't have to say it. The path of cultivation for us cultivators is difficult. This sort of scorching heat is something that disciples can endure."

As Ye Tian spoke, he felt depressed in his heart. This was truly too hot. Who could stay by the side of a pill furnace for a long time? Yao Lao slightly nodded his head when he saw this. He seemed to be very satisfied with Ye Tian's performance as he laughed, "Hehe, Ye Tian, do you know why I am so addicted to refining pills?"

"Disciple is slow-witted, please enlighten me, Master." "Yes." Ye Tian replied respectfully. "Not only is the path of alchemy vast and profound, the most important thing is to refine the heart." Yao Lao stroked his beard as he said indifferently. Refinement? "Haha, Master's words are a bit incomprehensible to disciple. What does pill refining have to do with refining the heart?"

Ye Tian, do you know what is the hardest thing to refine in this world? Let me tell you, it's not materials but the human heart. Isn't there a saying in your mortal world? "Who in this world can be a true stone? Even the most wicked have a weak side in their heart, pity, selfishness, helplessness, all of these people do. If we monks want to achieve a perfect state of mind, then we must refine our hearts so that our hearts are not moved by anything else, neither arrogant nor impatient.

I am obsessed with the Dao of alchemy. Firstly, the path of alchemy is indeed vast and profound, with endless magical effects. Secondly, I have to borrow the high temperature of the alchemy furnace to refine my mind and strengthen it. "Every time I see this furnace refining materials, it seems to be unceasingly refining my heart." Yao Lao said to Ye Tian in an enigmatic manner.

"Disciple understands that refining pills can hone one's mentality, and this method is indeed not bad. Disciple understands and will often follow Master in refining pills to hone his mentality when he breaks through to the Soul Formation stage." Ye Tian bowed towards Yao Lao and replied.

"Yes, the Spirit Severing state of mind is very important. Oh right, you didn't come to find me just to see me, right?" Yao Lao asked.

"Yes, master. Disciple's first style of cultivation requires the assistance of fire essence, so I came here to ask where you can find fire essence." Ye Tian replied.

The old man didn't ask Ye Tian Tian about the cultivation method. He stroked his beard and said, "There are four types of activities in this world: ordinary fire, alchemy fire, true fire, and mystical fire. Above them are the three types of true fire.

For alchemy, using Pill Fire is enough, but refining a weapon requires true fire in order to forge the materials.

For example, in the depths of some ancient lava, there would be the formation of a profound fire. The power of this mystical fire was so strong that even a small wisp of it could burn away everything in its path, so it was not suitable to refine pills nor could it be used to refine weapons.

As for the fire essence, it is also called the fire spirit. This fire spirit can only be created by luck, whether it is alchemy fire, true fire, or mystic fire, by chance, it can form a fire spirit. Especially when he practices fire-attribute cultivation methods. "

"As far as I know, the Valley Master of Burning Heaven Valley, one of the top ten sects in the world of cultivation, was cultivated by the True Fire Spirit, but don't bother fighting with him. Burning Heaven Valley is too far away from here, and that Valley Lord is a Seven Calamities Rogue Immortal; he could stab you to death with a finger." Yao Lao said with an unkind smile.

"This thing is so rare?" Even Master doesn't know where else it is. " Ye Tian said with a face full of disappointment.

"Let me think." Yao Lao saw Ye Tian's disappointed expression and said while stroking his beard.

After thinking for a while, Yao Lao suddenly spoke up, "Perhaps there is a place called Heavenly Thunder Mountain, which is about a day's journey northwest of the Gate of Supreme Mystery. There are some special type of lightning stone which can attract lightning strikes out of nowhere, and some master refiners like to place a small piece of lightning stone when they forge weapons, which could lead to lightning strikes. This way, the weapon would be equipped with the numbing thunder attribute, and they can only control the slightest amount of lightning, otherwise a careless move would destroy the weapon out of the furnace."

"However, that place is filled with lightning all year round, and lightning strikes are as high as the heavens. You have to be careful when going there." Yao Lao warned.

"Oh, Master, is there really any fire essence at all? If there are disciples who want to take the risk, they have to go. " Ye Tian immediately became overjoyed and asked, "Uh, I'm only guessing that I'm not sure. This is because this lightning easily forms thunder and fire, and it can also form a fire spirit due to some lucky chance." Yao Lao smiled in embarrassment.

Ye Tian was instantly speechless. However, since he had the opportunity, he decided to take a look. Otherwise, he really wouldn't be able to cultivate his [Skyfire Seal].

Subsequently, the old man taught Ye Tian some basic knowledge of pill refining before sending him off. Ye Tian could only bitterly go down the mountain after seeing that Yao Lao had buried his head in his herbs.

Ye Tian originally wanted to find Ning Xue, but he suppressed this thought. After all, if Ning Xue was cultivating, it wouldn't be good to disturb her. Thus, he decided to wait until he got back from Thundercrash Mountain before going to see Ning Xue.