The energy within Ouyang Ningxue's body was constantly growing stronger, attempting to occupy her entire meridian system.

Even more outrageous, the bones in her body were being burst apart one by one by the energy, just like firecrackers, making a crackling sound.

Li Xuanzu grabbed Ouyang Ningxue's arm, attempting to use his divine sense to control the restless energy.

However, the energy did not seem to harm Ouyang Ningxue's life; it was helping Ouyang Ningxue rebuild her bones.

The healing process was very fast, and the "crackling" sound was so loud it made your teeth ache.

The torn meridians have been repaired and are now thicker, stronger, and have a faster energy transport speed than before.

Despite the intense pain, Ouyang Ningxue did not faint. She gritted her teeth and endured the agony of advancing to the fourth tier.

"To destroy and then rebuild?" Li Xuanzu murmured, withdrawing his hand from Ouyang Ningxue's grasp.

Ouyang Ningxue stood up, looking at her body in disbelief.

Her originally healthy wheat-colored skin became much whiter, and her facial features became more defined, making her already outstanding appearance truly breathtaking.

The muscles in the hands, which were not very noticeable, are now visible, but this does not detract from the aesthetic appeal.

"Has psionic energy changed?" Li Xuanzu asked.

"No, it's still the same psionic energy, only the enhancements in all aspects are much higher," Ouyang Ningxue answered truthfully.

As she spoke, she opened her palm, pointed at a road sign a hundred meters away, and then clenched her fist, the plastic road sign magically forming an irregular sphere out of thin air.

"Is there anything that's bothering you?"

"No, I feel like I've reached an unprecedented peak in my current state." Ouyang Ningxue said, her eyes gleaming with eagerness, as if she couldn't wait to find that fourth-tier zombie to practice on.

Li Xuanzu looked at her and smiled.

Indeed, no one can resist power; if someone can, it's because they haven't yet experienced what it feels like to possess power.

"Let's spar a bit later, and let me see the difference between the third and fourth tiers," Li Xuanzu said to Ouyang Ningxue.

"Oh, right," Li Xuanzu added, "You don't need to hold back, you can't kill me."

This sentence served as a calming agent for Ouyang Ningxue.

She had genuinely considered holding back.

The two found a random open space nearby and began practicing their sparring.

The two stared at each other silently, neither making the first move.

Li Xuanzu broke the deadlock first, his figure twisting as he flashed to Ouyang Ningxue's side.

Ouyang Ningxue's lips curled into a smile as she twisted the spear behind her, sending the silver tip stabbing straight at Li Xuanzu.

Li Xuanzu dodged the attack by sidestepping, then turned and tried to grab the handle of the gun.

However, Ouyang Ningxue's twisting of the gun was not for show; the high-speed rotation made it impossible for Li Xuanzu to hold on, and as a result, his palm was scraped and bled profusely.

Li Xuanzu let out a soft "Eh," stepped back to create distance, and the wound on his hand healed completely in the blink of an eye.

In their first encounter, Li Xuanzu was at a disadvantage.

Ouyang Ningxue did not choose to press her advantage. Instead, she swung her spear, and drops of blood splattered from the spear tip onto the ground.

"Not bad reaction speed? This isn't a psionic effect, is it?" Li Xuanzu stretched his body and asked Ouyang Ningxue.

Ouyang Ningxue didn't speak, but simply responded with a smile.

"I see. We don't need to avoid vital points anymore. After all, the zombies coming next won't hold back." Li Xuanzu had already guessed this, and with a sudden push off the ground, his speed increased by three points compared to before.

Even the bones inside Li Xuanzu's body creaked and groaned, as if they couldn't bear the energy.

However, the torn muscles will be repaired quickly, and the strained ligaments will also recover quickly.

Li Xuanzu moved swiftly, attacking from different directions. Ouyang Ningxue gradually found herself unable to defend herself and began to disregard her defense.

There was even a shot that grazed Li Xuanzu's heart, which he dodged, but instead pierced his ribs and lungs.

Before Ouyang Ningxue could even feel smug, she discovered that she couldn't pull the spear out at all; after Li Xuanzu was pierced through the body, the spear was stuck in his throat.

Ouyang Ningxue was only stunned for a moment before she immediately let go and released the weapon, but she was still a step too slow.

During this brief moment, Ouyang Ningxue received a solid punch to the cheek, knocking out two of her teeth.

"Heh, heh, not bad. Fourth-tier strength. If it were anyone else, they might not be able to achieve this effect." Li Xuanzu seemed to be laughing, but his voice was like a broken bellows, he couldn't even speak clearly, and it sounded like he was leaking air.

"Pah, you really are a monster." Ouyang Ningxue spat out a mouthful of blood mixed with tooth fragments and used her spiritual energy to pull a steel bar from a nearby house.

"However, the abilities of a fourth-tier cultivator are not limited to these. Be careful," Fu Yu warned, gripping the steel bar and rubbing his slightly dizzy head.

Li Xuanzu did not let his guard down after disarming Ouyang Ningxue; her spiritual energy was more than capable of producing weapons.

Behind Ouyang Ningxue, large sections of houses collapsed, and steel bars rose from the ground, as if they had been given a soul.

Nearly a thousand steel bars floated behind her.

"Can it be blocked?"

"Hehe, if that's all, come on." Li Xuanzu replied, looking at the writhing flesh and blood at the wound site.