Seeing Xu Feng's inquiring look, Xu Yi's brows furrowed lightly and said to him solemnly: "On this continent, if you want to find that kind of superb spirit grass, in addition to the depths of the jungle where spirit beasts are all over the place, there is also a place to go, where it may appear!"

In the Black Mountain Range, there are also some ancient jungles, and there are terrifying spirit beasts everywhere, and it is very likely that there are superb spirit grasses that grow more than a thousand years in them, but after all, that kind of place is too dangerous, with Xu Feng's current strength, he will definitely lose his life after entering.

Xu Yi didn't want Xu Feng to be too adventurous, so he frowned and looked at him deeply and said: "More than a thousand miles south of the Great Chu Kingdom, there is a city called Ancient Desolation, it is said that there is an auction house there, and there will often be peerless treasures there, you might as well go and take a look!"

The ancient deserted city, within a radius of thousands of miles, people of all shapes and sizes stay there all year round, and there are often many peak powerhouses in it, and many mercenary groups are trading there, which can be regarded as a black market.

Some things that are not easy to sell, they usually find buyers when they get there, because it is a three-regardless zone, there will often be a fight in the city, and the strength of the True Yuan Realm can only be regarded as a small person there. In addition, there is an unwritten rule in the ancient desert city, that is, if you want to trade in it, you must barter for things.

Xu Yi had also been there once before when he went out to practice as a disciple, but the ancient desolate city was too dangerous, and Xu Yi only vaguely knew about it.

Hearing the head talk about the things in the ancient deserted city, Xu Feng couldn't help but be curious, there was such a place on this continent, and Xu Feng was also interested for a while.

It is said that there are three major forces in this ancient deserted city, which have been fighting all year round, and many strong people have fallen in the battle. There are also countless mercenary squads, and the mountain bandits will write off the looted things there, and some combat skills elixirs that ordinary people can't see may appear there.

Xu Feng thought about it for a while, and felt that it was a good place to practice, and under the mixture of dragons and snakes, maybe someone would know about the Hanging Mountain, and it would be possible for him to find the superb spirit grass needed to refine the heaven-level spirit pill.

Thinking of this, Xu Feng glanced at Xu Yi and said solemnly: "Master, I should go out to practice now, that ancient deserted city is indeed a good place to go!"

Although he didn't know why Xu Feng needed a superb spirit grass, Xu Yi didn't say anything to refuse, nodded lightly, and agreed to Xu Feng's request.

Back in the small courtyard, Xu Feng stayed in the room for another night, and when the sky was exposed to the white of the fish's belly, he finally opened the remaining meridian on his arm, and felt the surging true yuan power in his body.

"Phantom Sword Technique!"

With an angry roar, the True Yuan Force in Xu Feng's body suddenly came into operation, swam along the meridians opened up in his chest, and quickly converged on his right palm, and then a faint light lit up, and an almost transparent short sword appeared in his hand.

The first time he used the Phantom Sword Technique to achieve this effect, Xu Feng was already very satisfied, and then he released his soul power, his right hand shook, and the transparent short sword in his hand blasted out quickly towards a big tree outside the courtyard.

Under the control of the huge soul power, this transparent lightsaber shot out, like an arrow off the string, leaving behind the afterimage of the Dao.

However, although the speed of this transparent short sword was fast, it had just flown a distance of more than ten meters before it disappeared into the air, and the true yuan power on the short sword also dissipated.

"Alas, the power is still too small!" Seeing that the short sword did not stab the big tree at all, Xu Feng showed a wry smile on his face and shook his head helplessly.

This phantom sword technique has been practiced to the realm of Dacheng, and it can gather a huge lightsaber about dozens of meters long with the true yuan power in its body, which can be described as incomparable under the control of soul power.

But the short sword condensed by Xu Feng in front of him couldn't cause a trace of damage to the enemy at all, and this phantom sword technique was really not so easy to practice.

Taking a deep breath, frowning and standing in the courtyard, Xu Feng considered the ancient deserted city that the head said, that ancient deserted city Xu Feng must go, but before going there, he must be fully prepared.

Now Xu Feng's strength has only entered the middle stage of the True Yuan Realm, although he is already a master, but in that ancient deserted city, Xu Feng can be said to be no different from an ant.

The strength of the humanoid seal made Xu Feng far superior to the masters of the same realm, but now he still had the strength to fight against the powerhouse of the late stage of the True Yuan Realm of the Bloody Demon King, if he met the powerhouse of the Phantom God or even the Spirit Void Realm, Xu Feng would not even have the qualifications to make a move.

This illusory magic technique is a life-saving method, and Xu Feng also hopes to practice it to the fullest, but looking at the current situation, if he wants to cultivate this illusory sword technique to the extreme, it will take at least a few months, and Xu Feng can't wait.

Looking at Mu Ningzhu in the distance, who was wearing a purple robe and walking towards him with a food box, Xu Feng's heart moved slightly, and he didn't know whether to tell her about going out to practice.

The ancient desert city is too dangerous, Mu Ningzhu's strength is still relatively low now, and when he encounters danger, it is easier for Xu Feng to solve it by himself, but if he brings Mu Ningzhu, Xu Feng will probably not be able to take care of her. Xu Feng didn't want her to be in danger, so Xu Feng didn't plan to take Mu Ningzhu with him when he went to the ancient deserted city this time.

Eating the breakfast sent by Mu Ningzhu, Xu Feng was thinking about how to tell Mu Ningzhu about this, but the well-behaved Mu Ningzhu looked at Xu Feng with some nervousness on his face.

"Brother Feng, do you have anything on your mind?"

Mu Ningzhu knew Xu Feng very well, and it could be seen from Xu Feng's eyes what Xu Feng was thinking, looking at Xu Feng's absent-minded look when he was eating, Mu Ningzhu asked in a low voice at the moment.

"Uh...... Girl, I'm going out to practice for a while!" Xu Feng put down the food in his hand, looked at Mu Ningzhu and said softly.

"That'...... Can I go with you?" Mu Ningzhu didn't know where Xu Feng was going, but he still looked at Xu Feng with a look of expectation and asked.

Mu Ningzhu had the closest relationship with Xu Feng in the Guiyuan Sect, and after Xu Feng rescued him this time, Mu Ningzhu secretly decided in his heart that he would never leave Xu Feng for half a step in the future. Now that Xu Feng proposed to go out to practice, Mu Ningzhu didn't want to leave him, and looked at Xu Feng with a hint of hope in his eyes.

Let Xu Feng leave Mu Ningzhu behind and go to the ancient deserted city alone, Xu Feng was also a little unbearable. After all, he had just rescued her from the Great Yuan Kingdom, and Xu Feng didn't want to be separated from Mu Ningzhu, but Xu Feng remembered that Zhou Zhirou was still unconscious, and his determination to go to the ancient deserted city was a little stronger.

Gently touching Mu Ningzhu's hair, Xu Feng whispered to her: "Girl, the place I'm going to is very dangerous, I'm afraid you ......"

Xu Feng wanted to say that he was afraid that Mu Ningzhu would be harmed, and he didn't want her to go into danger with him. But Mu Ningzhu's face flushed, looked at Xu Feng and said gently: "With Brother Feng, I am not afraid of going anywhere, Brother Feng also promised me before, we will not be separated in the future!"

Now Mu Ningzhu only has Xu Feng in his heart, although he knows that the place where Xu Feng is going is very dangerous, Mu Ningzhu is still very determined, and wants to go out with Xu Feng. Perhaps, it was because in those days, thinking about it day and night, made her understand what she wanted.

Looking at Mu Ningzhu's slightly reddened eyes, Xu Feng's heart also showed a trace of unbearability, and secretly gritted his teeth and looked at Mu Ningzhu and said softly: "Okay, let's go together! We won't be separated again in the future!"

After eating breakfast, Xu Feng practiced the illusion technique in the small courtyard for a while, but after a noon, the short sword condensed by Xu Feng still failed to cause any damage to the big tree in front of the courtyard.