Upon breaking through the third turn of the Nine-turn Vajra Body, a golden light emitted from Lu Yu's body surface. This golden light possessed extremely strong defensive capabilities, nearly immune to spiritual power damage at the level of the Qi Domination Realm, and exhibited high exemption effects against physical damage as well.

Being immune to spiritual power damage at the Qi Domination Realm differs in meaning from the ability of the Tiangang Mysterious Qi to resist damage at the same realm; the former is passive—standing still, Qi Domination Realm cultivators cannot cause any harm to Lu Yu.

The latter requires consumption. Although it can resist attacks from Martial Cultivators below the Sea of Qi Realm, Lu Yu's own spiritual power needs to be expended.

If Lu Yu does not replenish the consumed Tiangang Mysterious Qi, those at the Qi Domination Realm can eventually break through its defense by continuously attacking and depleting its energy.

Overall, immunity is much stronger.

Most importantly, the third layer of the Nine-turn Vajra Body allows Lu Yu to be immune to abnormal states at and below the Qi Domination Realm—an effect that Tiangang Mysterious Qi cannot bring.

Reaching the level of immunity to spiritual attacks at the Qi Domination Realm by the third turn, Lu Yu eagerly anticipated the powers of the subsequent turns of the Nine-turn Vajra Body.

Not everyone who trains in the Nine-turn Vajra Body can gain immunity to spiritual power attacks by the third turn, but because Lu Yu's starting point and foundation are so high, the power of the Nine-turn Vajra Body is maximized.

For others starting outright with the Nine-turn Vajra Body, unless they reach Lu Yu's realm, possessing similarly powerful Qi Blood and physique, they cannot attain the same formidable immunity.

Otherwise, they can only become immune to the spiritual power damage of the Qi Cultivation Realm or even weaker.

Tiangang Mysterious Qi serves as a shield, while the Nine-turn Vajra Body acts as both a tyrannical body and an immunity to certain levels of spiritual power damage.

The second Thunder Source Fruit helped Lu Yu break through to the third turn of the Nine-turn Vajra Body, yet the power was not fully absorbed, and Lu Yu continued to absorb the remaining power to train for the fourth turn of the Nine-turn Vajra Body.

After training for a while, the power of the Thunder Source Fruit was fully absorbed. Lu Yu exhaled a breath of turbid air, expelling impurities tempered within the body, with a few blue electric lights flickering amid the Qi arrows.

With the Vitality Power of the Thunder Source Fruit restoring the body, the injuries it caused were not severe.

A small portion of power still remained hidden within, which could not be digested in the short term, and he could only wait for the body to automatically digest it since he wasn't able to actively mobilize spiritual power to refine the remaining power.

Similar to a cooldown time, after refining a Thunder Source Fruit, one has to wait a period before refining a second, providing time for the body to digest its power.

This time, having consecutively consumed two Thunder Source Fruits, Lu Yu wished to continue refining a fourth one, but at the very least, he would need to wait more than three days.

Originally, after refining a Thunder Source Fruit, waiting just one day would suffice for the body to digest its power; refining two extended the required time significantly, needing three days for complete digestion.

Lu Yu glanced at his current experience points, which had reached 3.5 million. He decided to take these three days to farm experience points!

Within three days, accumulate experience points to 10 million, and then as long as the spiritual power is accumulated to a threshold limit, he can immediately use the experience points to break through to the Sea of Qi Realm, becoming a Martial Cultivator of that realm.

If possible, Lu Yu didn't want to advance to the Sea of Qi Realm so quickly because he was currently invincible in the Qi Domination Realm, easily able to annihilate Martial Cultivators of that level.

Upon advancing to the Sea of Qi Realm, the experience points gained from killing Qi Domination Realm monsters would significantly decrease, and even with his enhanced strength post-promotion, he couldn't handle the Sea of Qi Realm threats as easily as those of the Qi Domination Realm.

"Whether to advance, I'll consider when the time comes; for now, let's focus on accumulating experience points," Lu Yu thought, knowing he could decide since the experience points were in his control.

Lu Yu exited the room, noticing that dusk had fallen. Today's battle seemed to have ended, as no sounds or cries from the city walls were heard anymore.

Martial Cultivators needed rest to restore spiritual power and replenish physical strength with food, while the South Barbarian Natives also needed to eat to regain energy, making continuous fighting impossible.

Fighting from morning to dusk demonstrated the massive endurance of the South Barbarian Natives, especially since they didn't have any reserves or reinforcements; everyone fought from morning till evening.

Maintaining such high-intensity battles for a whole day required astonishing amounts of energy and stamina. Even with their superhuman endurance and physique, both natives and cultivators would feel exhausted.

It was somewhat better for the human side, as they could retreat behind the walls to rest when tired, but for the attacking natives, there was no room for respite—failure to advance meant certain death.

After eating, Lu Yu came to the city wall, finding a part of it collapsed. It seemed as if obliterated by some immense force, leaving a gap without even ruins.

A multitude of corpses piled up there, both South Barbarian Natives and human Martial Cultivators. Some were digging through the piles, searching for survivors, hoping their friends, teammates, comrades, or relatives might still live.

Warriors clad in full spiritual armor approached the edge of the corpse pile, lifting a wooden bucket to pour on the pile.

It was oil, used for burning. That city guard intended to incinerate the corpse pile, preventing the South Barbarian Natives from exploiting the bodies.

At the same time, this served to clear the section of the wall so they could reseal it; otherwise, it would become a breach in An Nan City.

Phoo~ the brown oil splashed onto the corpse pile, and the fully armored warrior struck his fingers together to spark a flame, igniting the pile.

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