However, after pondering for a long time, Ye Feng still couldn't figure out what he was lacking.

Night Breeze shook his head and sighed, a deep look of confusion on his face.

"What's wrong, Ye Feng?" Jiang Lingxuan asked as she walked over.

“I always feel that my Five Elements Thunder Tribulation Sword is not perfect yet, as if something is missing,” Ye Feng said.

"What's missing?" Jiang Lingxuan asked again.

Sun Muqing also looked at Ye Feng curiously, waiting for Ye Feng to give an answer.

But Ye Feng shook his head and said with a wry smile, "It's precisely because I don't know what's missing that I'm so troubled."

“That shouldn’t be the case. Didn’t you already fully comprehend the Five Elements True Qi?” Jiang Lingxuan said.

Sun Muqing thought for a moment and said, "Is it because you didn't obtain the complete content of the Netherworld Sect's fundamental Great Law, the Heavenly Empress Earth Technique, that you have this deficiency?"

"That shouldn't be the reason. I also don't have the fundamental technique of the Golden Cloud Sect, but I have also fully comprehended the Golden Element True Qi," Ye Feng said after thinking for a moment.

Jiang Lingxuan and Sun Muqing both felt somewhat helpless.

Night Breeze's level was simply too high. Compared to Night Breeze, the two of them could be said to have shallow knowledge, so even if they wanted to help, they couldn't do much.

Just then, footsteps sounded outside the door.

Then a familiar voice came: "Mr. Feng, my master wants to see you. Are you free now?"

This is exactly Zhuo Er's voice.

However, Zhuo Er no longer speaks with the same carefree attitude as before. His tone is very cautious, even respectful.

That's for sure.

Night Wind has already revealed his true strength, and Zhuo Er also knows that Night Wind is a powerful expert who has entered the Saint Realm.

Given this, how could Zhuoer dare to act as casually as before?

"I'm going out for a bit, wait for me," Ye Feng said.

"Mm." Jiang Lingxuan nodded with a smile.

Sun Muqing then said, "Be careful."

"Don't worry, Shi Ji won't do anything to me. Besides, she's no match for me. Moreover, Nan Lingrong already told Shi Ji my identity, and Shi Ji already knows that I'm a Saint Realm expert," Ye Feng said with a smile.

As Ye Feng stepped out of the room, he saw Zhuo Er waiting for him outside.

"Let's go," Ye Feng said with a smile.

Zhuo'er immediately led the way, while Yefeng followed leisurely behind him.

Seeing that Zhuo Er was very reserved, Ye Feng smiled and said, "Senior Brother Zhuo Er, you don't need to be like this."

Zhuo Er gave a wry smile: "Don't call me senior brother. I dare not be your senior brother. After all, you are a Saint Realm expert. My senior sister told me that you are already at the ninth level of the Saint Realm, which is even more powerful than my master. How could I have the courage to call you brother?"

Since Zhuo Er had already said that, Ye Feng shook his head and stopped talking nonsense.

Before long, Ye Feng followed Zhuo Er to the Underworld Palace.

As soon as Ye Feng entered the main hall of the Underworld Palace, he saw Shi Ji sitting on a futon waiting for him.

"Zhuo'er, you go out first," Shi Ji said, opening her eyes.

Zhuo Er nodded in agreement, took three steps back, turned and left, closing the door to the main hall of the Underworld Palace.

Ye Feng strode up to Shi Ji, bowed, and asked, "May I ask why the sect leader summoned me here?"

Shi Ji smiled and looked Ye Feng up and down, then asked, "You helped us deal with the Demon Saint of the Heavenly Demon World this time, which is a great achievement, and I cannot fail to express my gratitude."

It turns out that Shi Ji wanted to thank herself.

Ye Feng smiled and said, "I have gained a lot from the Underworld Sect, so you don't need to give me any additional compensation."

Shi Ji insisted, "Mr. Feng, what you're saying makes me uneasy. As the saying goes, there must be a reward for merit. If I don't show any appreciation, I'll feel awkward."

After a pause, Shi Ji continued, "I wonder what Mr. Ye wants? Just tell me, and I will not refuse as long as it is within my power."

Ye Feng thought for a moment before saying, "Then, please, Sect Master Shi, teach me the final three levels of the Imperial Heaven and Earth Technique."

Ye Feng no longer needs the final three levels of the Imperial Heaven and Earth Technique.

After all, he had already fully comprehended the Earth Element True Qi.

But besides that, Ye Feng couldn't think of anything else that interested him, so he might as well choose this.

Moreover, Ye Feng really wanted to try and see if the reason why his Five Elements Thunder Tribulation Sword was not perfect was because he lacked the last three levels of the Imperial Heaven and Earth Technique.

Upon hearing Ye Feng's request, Shi Ji showed no surprise.

She seemed to have anticipated that Ye Feng would make this request.

"Alright, I will now impart to you the fundamental techniques of our Netherworld Sect. However, I require you to swear an oath by your inner demons that you will never, in this lifetime, impart the fundamental techniques of our Netherworld Sect to anyone else!" Shi Ji said solemnly.

"No problem, I swear it."

Without hesitation, Ye Feng made a solemn oath to Shi Ji in front of her, and only then did Shi Ji finally nod in satisfaction.

"Come here, come to me," Shi Ji beckoned.

Night Breeze then strode up to Stone Princess.

Shi Ji raised her right hand and placed her slender finger on Ye Feng's brow.

The final three levels of the Imperial Heaven and Earth Technique entered Ye Feng's consciousness in an instant, and Shi Ji even imparted her own insights into cultivating the Imperial Heaven and Earth Technique to Ye Feng as well.

"Thank you," Ye Feng said, bowing slightly.

"When do you plan to leave, Mr. Feng?" Shi Ji asked.

"It will take at least two or three days, and at most half a month," Night Wind replied.

Shi Ji didn't say anything more, just nodded slightly.

Night Breeze then took his leave.

However, just as he reached the door, Ye Feng suddenly remembered something, turned around and looked at Shi Ji and said, "I almost forgot, I'm giving you all three hundred Earth Spirit Orbs that I collected in the Earth Elemental Vein now."

As soon as Ye Feng finished speaking, he raised his hand and waved.

One by one, bright yellow beads flew out of Ye Feng's storage ring and floated in front of Shi Ji.

Shi Ji could tell at a glance that there were exactly three hundred Earth Spirit Orbs, not one more and not one less.

However, in reality, Ye Feng collected more than three hundred Earth Spirit Orbs.

He still has more than a dozen Earth Spirit Orbs in his storage ring.

However, Shi Ji's initial request was for Ye Feng to collect three hundred, so Ye Feng did not intend to take out the remaining dozen or so Earth Spirit Orbs.

Perhaps these Earth Spirit Orbs will be of some use in the future?

"Thank you, Mr. Feng," Shi Ji said with a smile, putting away all three hundred Earth Spirit Orbs.

"It was already agreed upon, so there's no need for thanks."

Ye Feng bowed and then left the main hall.

After returning to Yingchun Palace, Ye Feng began to study the final three levels of the Huangtian Houtu Technique.

Ye Feng has already fully comprehended the Earth Element True Qi, so comprehending the Imperial Heaven and Earth Technique is naturally extremely simple for him.

Furthermore, Shi Ji also imparted her insights to Ye Feng, and Ye Feng's speed in comprehending the techniques could only be described as rapid.