The reason why the enemy digging a tunnel would be detected by Gu Erdan, and even accurately dispatch two thousand elite soldiers to follow the other party, and wait for the other party to show their heads, the reason is actually very simple.

That is, Gu Erdan has a special operations team that is good at detecting the underground situation.

Have you heard of the fourth-order skeleton rats?

Ordinary undead have heard of it, I'm afraid I haven't even seen a second-order skeleton rat in my life.

After all, who would brain-pump to cultivate skeleton rats!

It turns out that the skeleton rat really has no cultivation value, even if it is promoted to the fourth order, its combat power is still weak and pitiful.

It's just that their digging speed has been qualitatively improved, and the most important thing is that their ability to perceive the underground has also become extremely terrifying.

As long as there is an underground movement within a radius of ten miles, they can accurately detect it, which can be called an underground radar.

It was also by relying on the skeleton rat that Gu Erdan was able to detect the other party's small movements, so he came up with a trick to wait for the rabbit.

In the early morning of the second day, as the black sun rose again, the fourth round of the enemy's attack began.

Only this time they did not rush over without brains, but began to arrange their troops as if the two armies were fighting, and all the troops pressed the border.

Standing at the head of the enemy army was a cavalry, a domineering cavalry of up to 300 in number, exuding black arrogance.

Death Knight! The pinnacle of the undead mid-level class! Born with fifth-order strength! At this time, there are as many as three hundred! Definitely a force to be reckoned with!

And at the front of these death knights, there is an even more domineering existence!

King of the Death Knights! Seventh-Order Boss! One of the Three Kings of the Netherworld! A direct subordinate of the King of the Underworld!

He once relied on the joint charge of the Death Knights under his command to kill three existences of the same level in one battle! It is even rumored that he can lead the knights under his command to compete with the eighth-order existence!

One battle after another, in fact, the death knight Yalei didn't care.

But he cares about time!

According to the original plan, he should have preserved his strength and disguised his identity, relying on the recruited cannon fodder to forcibly rush through the defense line, and then lead the elite troops to take the opponent by surprise.

For this reason, he even did not hesitate to spend several days to bring this group of slow-moving cannon fodder.

But who would have thought that the other party seemed to know his plan, and actually put a hard bone here.

The original plan had failed, even if he could try his best to break through the opponent's defense, but if the hard bones of this level were gnawed off, it would inevitably arouse the opponent's vigilance.

Although the 300 Death Knights are strong, they are not invincible, and if they fall into the sea of people, the Death Knights who lose their ability to maneuver will eventually be drowned by the sea of people.

Straightening his helmet, Death Knight Arley had a look of determination in his eyes.

At this point, I can only choose to forcibly break through at any cost.

Relying on the perfect mobility and assault power of the Death Knights, as long as they can break through the defense line before the rear target reacts, and successfully rush to his target, then this battle will still be fought.

Without any nonsense, Death Knight Areley buckled his mask and pulled the reins suddenly.

The fourth-order undead horse that stepped down neighed and launched a fearless charge towards the endless undead in front of him! All abilities are unlocked at the same time!

Howling Wind Accelerates!

Death Charge!

Phantom of the Nether!

One ray after another of light flickered on the Death Knight! 300 Death Knights carry monstrous flames and start their own war.

The death knight Yalei, who rushed to the front, shook the flat riding spear in his hand suddenly! A black haze spread from him, turning into shackles and passing on to the other Death Knights.

Seven Rings Necromancy! Shackles of Death!

At this moment! 300 knights seem to be in one! The momentum is crazy to increase!

It's close! It's closer!

I saw that the sky suddenly went dark! Arrows rained down with javelins!

These attacks landed on the Death Knights, sending ripples through the haze that enveloped them!

The combined attack of hundreds of fourth-order undead was difficult to break through the opponent's spell barrier!

Seeing this scene, Gu Erdan was suddenly startled, and the Black Warrior Legion next to him reacted faster, and directly erected a shield to form a simple shield wall to protect Gu Erdan.

At this time, not only Gu Erdan was shocked, but in fact, the death knight Yalei was also stunned.

He knew that these enemies were strong, but he never expected them to be so strong!

This wave of dense attacks is enough to kill the fifth-order undead! Whether it was an arrow or a javelin falling from mid-air, none of them was weaker than the fourth-order level.

If it weren't for the Seven Rings Spell Death Shackles that could gather and mobilize all the power of the connector, it would have prevented this round of attack.

If the death knight charges on his own, I am afraid that he will directly be subtracted by this round of offensive by more than 30% of his combat power!

The speed of the cavalry charge was amazing, especially the large charge launched by the group of hundreds.

With full speed, not to mention that the attacks in front of you can be carried down, even if they can't! There is only one option!

There is no turning back from the bow! Or break through! Or break the arrow here!

Boom! 300 imposing Death Knights, with arrows in the sky! Slam into the shield wall of high-level skeleton guards!

The heavy bone tower shield that was more than half a person tall couldn't stop the opponent's sprint, and it didn't even slow down the opponent's speed in the slightest!

The skeleton is shattered! Hordes of skeletons are scattered!

The first layer of heavy armor defense! Break!

The black gas that unites cuts three layers! Death Knight Aree roared! Lead the soldiers to continue to charge!

The second line of defense is coming! It is also the line of defense that poses the greatest threat to the Death Knights! By the Skeleton Pikemen, the Skeleton Spearmen and the Axemen! A battle of spears made up of skeleton halberds!

This group of guys was supposed to hide behind the Skeleton Guardians and use the advantage of the Weapon Commander to attack the enemy.

At this time, the shield wall was broken, and this group of guys clung to each other and stabbed out the spear in their hand with all their might!

Spearmen touch cavalry! The two are rivals! Life and death are unpredictable when you fight!

It's just that the combat power of the two sides is not equal today! Rely on the blessing of the Seven Rings spell! At this time, the Death Knights are like a rainbow! I didn't hesitate to crash into the gun!

Countless spears are broken! Countless skeletons collapsed!

The death knights who rushed forward in the shape of an awl! Rushed through the second round of defense unscathed again!

It's just that the black qi united on their bodies has been reduced to only about forty percent at this time! Even the thick black mist began to fade and distort!

Third floor! Ranged troops!

The skeleton thrower directly grabbed the mallet in his hand, and the slingshot players did not hesitate to put away their toys and show the tomahawks in their hands!

Even the skeleton archers, who are not good at melee combat, do not hesitate to drop their longbows! pulled out a pocket version of the bone fruit knife............

The third round of defense was broken through without any accidents, even if the Death Knights broke through two formations in a row, and it was already the end of the crossbow.

Against a group of guys who are not good at defense, it is still easy for them to break the formation.

Seeing that all three elite troops of the enemy were defeated by himself, the death knight Yalei secretly breathed a sigh of relief.

Through the surprise attack of the air force before, he had already found that the first three units of the enemy were very strong.

Even the unit responsible for the long-range attack was unusually high in combat effectiveness.

But that's about it! Cross these three elite troops! The skeleton soldiers in the rear with a chaotic formation are just brought by this guy to support the field! It's just a snap of a finger!

Just break out of the enemy encirclement! Then this plan is not a failure! No matter how big the sacrifice is, it is worth it!

Pull the reins! The Death Knight Yare took the lead in rushing towards the skeleton reserves in a mess of camps, completely ignoring the ancient second egg who was tightly guarded by the Black Knights Legion in the middle.

Looking at the death knight Yalei who led the cavalry to whizz past the black warrior and rushed into the reserve, Gu Erdan had a confused expression on his face.

This guy rushed over so desperately, didn't he plan to carry out the decapitation plan?

I'm here, hey! What is he running towards the reserves?

The more than 6,000 members of the reserve team, who were messing around in the rear, saw the cavalry coming towards them, and all of them excitedly pulled out their various weapons.

Yo he! Big fish delivered to the door!

Could it be that we are finally going to get out of the army?!