With a "pop," Jackson swept one of the zombie's thighs, causing it to fly out horizontally.

"Olivia, quick!" Jackson chuckled.

With the previous experience, Olivia was no longer afraid of these zombies, and immediately took her hammer and ran towards the zombie that Jackson had just hit.

Harry also followed suit and learned from Jackson to only attack the zombies' limbs, leaving the fatal blow to Olivia.

Although these were all low-level zombies, there were also differences in strength between them. The weaker ones were easily defeated and moved slowly, while the stronger ones were almost comparable to level 1 Spiritual Source beasts. However, when faced with Harry and Jackson now, they were still easily defeated, with the final blow given to Olivia.

Olivia quickly killed five zombies and obtained five Spiritual Sources. She only needed four more Spiritual Sources to be promoted again and become a level 2 Spiritweaver.

When Jackson knocked down the sixth zombie on the roof, a dark shadow suddenly flashed in front of him, and another zombie jumped up with a rope.

This zombie was very fast, completely different from the previous six zombies. Jackson was startled and instinctively stepped back as the zombie flew up and kicked him in the chest.

With a muffled groan, Jackson was thrown back, and on the other side, Harry was taken aback. He lifted his iron rod and smashed it down on the Zombie.

A vertical eye-shaped rune appeared on Harry's forehead as he activated his "Peeking Eye Rune." He felt that this Zombie was somewhat unusual.

Just as Harry's iron rod was about to hit the Zombie's head, its chest suddenly cracked open. From the gaping wound emerged a pale arm that lifted to shield its head. Harry's iron rod landed solidly on the arm instead.

At the same time, a message appeared in Harry's mind, which was about the information of the Zombie in front of him.

"Name: Advanced Zombie, a powerful Zombie evolved from a low-level Zombie. In addition to possessing the instincts of a low-level Zombie, it also has a certain intelligence. Each type of advanced Zombie has a special ability evolved from it and has a certain probability of evolving into a higher intelligent creature: Undead."

These days, Harry didn't know how many Zombies he had seen, and he knew that these Zombies were evolving slowly like them. But now, he finally saw the first advanced Zombie. Compared with ordinary Zombies, the advanced Zombie in front of him not only had a significant increase in strength, speed, and reaction ability but also had special abilities.

A third hand grew in its chest, which was like its weapon. Even when Harry hit it with an iron rod, it couldn't break it.

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In surprise, Harry thought of Olivia's early warning just now.

It seems that she has acquired some extraordinary abilities after strengthening her eyes.

The third arm on the chest of the advanced Zombie in front of him blocked Harry's iron rod, and it grabbed the iron rod with the other hand, trying to take it away.

With a strong pull, Harry didn't compete with it for the iron rod, but sent it over, quickly approaching the advanced Zombie in front of him, his left hand clenched into a fist and punched it.

On the back of Harry's hand, four Fangs of Gluttony extended out. If his punch connected, the four Fangs of Gluttony could slice off the zombie's head.

On the other side, Jackson had already stood up after being thrown. A hint of annoyance appeared on his face. He had underestimated the zombie, thinking it was just a regular one and didn't pay much attention to it. He didn't expect the zombie to be so fast. By the time he noticed, it was already too late, and he was kicked down by the advanced zombie.

At this moment, Olivia had just killed the sixth zombie. She looked up and saw Harry swinging his left fist, launching a Fangs of Gluttony attack on the advanced zombie. She opened her mouth and suddenly shouted, "Be careful!"

Upon hearing her shout, Harry's heart skipped a beat. He saw that the advanced zombie's reaction was not much slower than his own. The third arm from its chest loosened its grip on the iron rod and suddenly grabbed at his face.

The advanced zombie's arm from its chest was longer than Harry's arm, and it could grab Harry's face before his Fangs of Gluttony hit it.

"This guy!"

The advanced zombie was incredibly strong. It even blocked the iron rod with its arm. Harry couldn't let it hit his face. He immediately changed tactics, pressing his left arm down, and the four Fangs of Gluttony sliced into the advanced zombie's pale arm.

The extremely sharp Fangs of Gluttony could not completely cut off the arm, only slicing through the shallow skin. Meanwhile, Jackson had already charged forward, holding a steel shovel in both hands and swinging it towards the advanced zombie's head.

The advanced zombie's third arm was just cut by Harry's Fangs of Gluttony, and it couldn't defend against Jackson's attack in time. It could only tilt its head and the steel shovel hit its cheek, scraping off half of the flesh and revealing the bone underneath. Then, it hit the left shoulder, immediately making a bone-breaking sound. The advanced zombie's left shoulder collapsed.

Harry took the opportunity to kick the advanced zombie's lower abdomen heavily, causing it to fall backward. Jackson shouted loudly, waving his blood-stained steel shovel and heavily striking it again.

Advanced Zombies have a certain level of intelligence, unlike low-level Zombies that are dull and unaware of evasion. When it fell to the ground, it immediately rolled along the ground, avoiding both of Jackson's swings. On its third swing, it extended its third arm to block, then grabbed the steel shovel and pulled it back with force, using this force to stand up. Jackson grunted, using both arms to try and snatch the steel shovel back. At this moment, Harry had silently appeared behind the Advanced Zombie, and the iron rod in his hand accurately hit it.

This Advanced Zombie suddenly became dull, with a "ding" sound ringing in its head. Its head collapsed from the middle, and red and white substances oozed out from the collapsed area.

This one blow was fatal, completely destroying the Advanced Zombie's head, and a Spiritual Source appeared, instantly flying into Harry's body.

"Level 2 Spiritweaver: Spiritual Source 7/20"

After gaining a Spiritual Source, Harry looked at the Advanced Zombie that fell heavily to the ground and let out a long sigh of relief.

This kind of Advanced Zombie is indeed very terrifying. It is not easy to kill it alone.

After killing the Advanced Zombie, no new Zombies were seen for the time being, but there were occasional noises coming from below.