Xu Dong and the three of them rushed all the way to the interior of the castle, while the dense skeleton soldiers desperately besieged them, trying to stop their progress.

"These undead are desperately trying to keep us from entering the inner city, there must be something good in there! Rush in! Xu Dong shouted.

"It's almost time to reach the inner wall! The skeleton soldiers in front are too dense to rush in! Xu Song emptied the skeleton soldiers within a few meters in front of him with a stick and shouted loudly.

"I'll make a big move, and then we'll quickly occupy the inner city gate!" Xu Dong jumped high, pulled out the Supreme Sword with his backhand, and swung it at the dense army of skeletons in front of him!

"The Son of Heaven is furious!" In Xu Dong's roar, a ten-meter-long Divine Dragon Phantom went straight towards the skeleton army! With a huge explosion, the army of thousands of skeletons within a radius of hundreds of meters in front of him was swept away! The system information jumped wildly, and thousands of immortal points were obtained.

"Take now, rush!" The three of them took advantage of the emptiness in front of them, and the army of the undead rushed into the inner city gate when they didn't have time to fill their positions! Xu Dong turned around and blocked the city gate, used up all the immortal fate points he had just obtained, and raised the "Tai First-class Lightsaber Dance" to the 5th rank.

"Streamer Five-Spinning Sword Dance! Disease! Xu Dong shouted, and three flying swords flew out of the Zhuxian sword box behind him, forming a sword formation together with the previous two, surrounding Xu Dong and constantly crushing the approaching skeleton soldiers!

"Quick! Close the inner gates! Xu Dong blocked the inner city gate and turned around and shouted.

Zhou Yiqing rushed into the inner city to block the army of undead who rushed out from inside, and Xu Song roared and pushed up a bronze inner city gate with all his might, this inner city gate was one meter thick and more than four meters high, and it was estimated to weigh at least a dozen tons. Xu Song's green tendons burst all over his body, desperately pushing the city gate, the bronze giant gate made a "quack" sound, and this gate that had not been moved for thousands of years was actually pushed by Xu Song and slowly closed!

Just when the city gate was about to close and there was only one crack left, Xu Dong squeezed into the inner city through the crack in a flash, and worked with Xu Song to close the city gate tightly!

"Holy! You're a big stupid guy! This city gate obviously has a starting winch, do you have to push it hard? Isn't it stupid? Xu Dong poked his finger at Xu Song's head and scolded.

"I'm born with divine powers! It's not a problem to push a city gate! Xu Song said proudly.

"! Can you two stop bragging about it there? The undead in this inner city are much more powerful than those outside, and Lao Tzu can't stand it! Zhou Yiqing yelled angrily.

"Oooh! Here it comes! Xu Dong and Xu Song hurriedly rushed up to help, and when they fought, they found that these skeletons in the inner city were really much stronger than those in the outer city, although the number was only nearly a thousand, but all of them were "Skeleton Warriors", and there were even a few "Skeleton Commanders"!

"Hey, what's this?" Xu Dong strangled a skeleton warrior with a sword, and found that a white glass bead fell out after the skeleton warrior fell apart. When I picked it up, it turned out to be a spirit crystal. This is the source of power in the body of the undead, similar to the magic crystal in the body of the demonic beast.

"Hah! I almost forgot that I still have a thug that I haven't summoned. These spirit crystals are just right for her to level up! Xu Dong smiled, then stretched out his left hand to draw a pentagram pattern in the air, and muttered in his mouth: "Wake up from the flames of purgatory, I call your true name, walk in the world, and destroy all evil!" Come out, Lilith! ”

A dazzling white light flashed, two huge blood-colored wings stretched out, and the figure of Hell Angel Lilith Miaoman appeared behind Xu Dong.

"Kill all the undead! Lilith! Xu Dong shouted.

Lilith's closed eyes suddenly opened, a pair of eyes turned out to be weirdly black, but the pupils were blood-colored, Xu Dong and the three couldn't help but shudder when they saw it!

Lilith let out a piercing scream, and a purple diamond-shaped crystal at the center of her brow suddenly shot out a red beam of light, and the beam of light slashed through the area where the skeleton army was, causing a series of explosions! The explosion was shattered and shattered. Hundreds of skeleton warriors were blown to pieces!

Lilith slowly pulled her right hand and slowly pulled out a long-handled scythe from the air, the black sharp scythe made people shudder from the bottom of their hearts. Lilith suddenly disappeared from the spot with the scythe in her hand, only to reappear behind a skeleton leader, slashing down with the scythe in her hand! The Skeleton Lord was sliced open like a piece of butter by a black scythe, scattering into a pile of broken bones.

"Wow! It's scary! This girl is not only in good shape, but also sweet-looking. Fighting is also a first-class awesome! Zhou Yiqing sighed.

With Lilith joining, the ensuing battle became a matter of suspense, and ten minutes later, the last skeleton warrior fell under Xu Song's stick.

"We've won!" Xu Dong shouted at Xu Song and Zhou Yiqing, who were panting slightly.

"Did you really win? How do I think this is just the beginning......" Xu Song said solemnly as he looked at the palace area at the end of the inner city.

"Yes, it seems that there are stronger enemies in that palace. Take a break, and we'll go in and take the castle! Xu Dong said, glancing back at Lilith, everyone in the battle just now was more or less injured, and Lilith's armor and battle skirt were slightly damaged.

Xu Dong collected the loot on the battlefield and harvested 733 white spirit crystals and 6 green spirit crystals. Then I clicked on the summon pet interface and selected Upgrade Lilith.

System information: Do you consume 100 magic crystals (or spirit crystals) to upgrade Hell Angel Lilith to Quadwingah?

Xu Dong immediately confirmed the upgrade, only to see that Lilith's body suddenly lit up with a strong light, and her whole body seemed to be wrapped in a bright cocoon, and a few minutes later, the light cocoon broke, and Lilith with four blood-colored wings appeared in front of the three of them.

"Wow! It feels prettier! It seems to be very powerful! Zhou Yiqing boasted.

"Hah, keep upgrading! Lilith's strength will definitely be needed for the next battle. Xu Dongdao.

So it cost 200 crystals to get Lilith to Seraphim, and 400 crystals to get to the eight-winged angel.

"! It's almost like a spirit crystal can raise Lilith to Deca-wingah! Damn! Xu Dong looked at the 33 white spirit crystals on his body and said angrily.

"Aren't there still a few second-order green spirit crystals that the Skeleton Commander has burst out? Put it up and take a look. Xu Song said.

"Oh, good." Xu Dong put the green spirit crystal into Lilith's upgrade interface.

System information: Upgrading the Hell Angel to the Ten Winged Angel requires the consumption of the fifth-order magic crystal and the angel heart.

"Nani? Upgrading the ten-winged angel requires a fifth-order magic crystal? What more angel hearts? I've never heard of it! Xu Dong exclaimed.

"Sure enough, it's a hurdle to go from the fourth order to the fifth order! Do the fuck all have to be stuck in this fourth-order profession? Zhou Yiqing sighed.

"That's it, Lilith is already strong, and now it's enough to rise to the eight-winged angel! Let's go up and see what the hell is in this palace! Xu Dongdao.

The three of them came to the main gate of the palace, and Xu Song stepped forward and pushed open the thick door with force. Xu Dong looked into the hall, I was obedient! There were twenty knights in black armor standing on both sides of the hall, and these knights were pressing their hands on the hilt of their swords to look at Xu Dong outside the hall.

"! Death Knight! Twenty! Xu Dong was directly dumbfounded, the Death Knight is a fourth-order undead of the Eight Classics, Xu Dong They are first-class martial artists in Huaxia, and they are also fourth-order.

"How's this going on? Four against twenty! There's no chance of winning! Why don't we slip away? Zhou Yiqing was cowardly at that time.

"Slip a yarn! Lao Tzu still has a killer feature! Xu Dong said angrily, and ripped off the summoning crest around his neck.

"Summon Steel!" A space gate appeared outside the palace gate, and the mountain giant demon Xiaogang ran out of the space gate excitedly. Immediately afterwards, Nako's neck stretched out and poked her head out of the space door.

"! Nako, don't squeeze it out! Get back! Retract it! Your size can't stand your toss here! Don't destroy Lao Tzu's castle! Xu Dong Chao Nake shouted that he had already regarded this underground castle as his property.

Nako let out a depressed roar twice, reluctantly retracting her neck.

"Haha! Now the situation is turning around, one fifth-order and four fourth-order against twenty fourth-order undead, the war of the century has officially begun! Xiao Gangchong! Lilith follow me! Xu Dong was extremely excited, and upgraded all the immortal points he had just obtained into the Streamer Sword Dance, and two more Immortal Swords flew out of the sword box, and a full seven flying swords surrounded him, and he rushed into the palace first!

Before Xu Dong could make a move, a sharp and piercing voice suddenly sounded in the hall and shouted, "Wait! Don't do it yet, warriors! ”

"Who? Who's talking? Xu Dong stopped in a sudden stop, looked around, and saw the twenty death knights facing Xu Dong and them with their hands on the hilt of their swords, and they seemed to form a half-circle guarding a mirror behind him that was more than one person high. In the mirror, there was a figure shrouded in black robes, and his face could not be seen clearly.

"Yo! Who are you? How could you be in the mirror? Is it fun inside the mirror? Xu Dong asked at the figure in the mirror.

"If you've been locked up in a mirror for more than 2,000 years, you'll know if it's fun!" The figure in the mirror said angrily.

"Hehe, you've been locked up in a mirror for more than 2,000 years, and these undead are clearly guarding you. I know who you are, the same lich who led an army of the undead to the city of the Quinns two thousand years ago! Xu Dong smiled.

The figure was silent for a moment, and said, "Yes, I am Sasha, the lich, I invaded this small underground world two thousand years ago, but I didn't expect those damned Quinns to have a last resort!" King Quinn sealed me in this abominable mirror when he died! Warriors, how about we make a deal? If you can save me, I will lead my army of the undead into your command and serve you! You will become the most powerful man on the continent! ”

Xu Dong suddenly burst out laughing, laughing breathlessly, and said with a sigh of relief: "Deal? There seems to be a maxim on this continent that it is better to make a deal with the devil than to believe in the oath of the undead. Are you fooling me? And make me the most powerful man on the continent? Take 10,000 steps back and say, I accepted your allegiance, and you kept your promise, and then what? All the forces on the continent will see me as an enemy because I am in the same league as the undead! Extinguish it and then hurry! How do I resist? Rely on your tens of thousands of tattered army of the undead? Or is it your strength as a sixth-order lich? ”

Sasha, the lich, said angrily, "What do you want? Otherwise, you can quit here, and everyone will not violate the river water! ”

"! Are you serious? Lao Tzu worked so hard to kill all the way in, but you let me go back? Just kidding, right? Xu Dong said with wide eyes.