The battle outside the Purgatory Fortress is gradually beginning to erode away, and even if the Kraken above them has not yet made a move, the huge oppressive force it brings makes the demon defenders completely unwilling to fight.

The commanders of the demon forces have spotted several sneaky escapes - some of the demons are beginning to become pessimistic and hopeless about the outcome of the battle, trying to escape and hide in the winter mountains further north.

In order to prevent the deserters from causing a greater rout, the demonic command chose to suppress the fugitives with the harshest torture.

These torture crackdowns had some effect, at least the last line of defense outside the Purgatory Fortress was not broken down by deserters.

But the continued strength of the swarm army is rapidly crushing the minds of all the demons on the front lines, who find that these terrifying monsters are even more fervent and ferocious than they are, and have reached a true level of fearless death, ignoring pain, just like the undead.

But their combat power is much stronger than that of slow and fragile zombies and skeletons, and many demons watched as their hardly organized defenses were easily torn apart by the swarm in less than a minute.

The swarm and the human alliance are marching forward, and the demon legion's defenses are shrinking and crumbling.

By the time the sun of the Second World slowly rose above Kraken's head, millions of corpses had been left behind by the demonic forces outside the city.

Judging by the time shown by the hourglass, it was only three days since the swarm began its assault on the Infernal Fortress.

And a large part of that time is used by the swarm to get along......

Seeing that the defense line outside the city was about to collapse, Shanke inside the Purgatory Fortress gave the order to retreat with an ugly face.

It could not risk leaving more troops out of the city, and now all its defenses had to be concentrated in the city, which had high walls and a large number of defensive weapons and traps as a fulcrum, in order to have the last chance of survival.

After receiving Shanke's order, the blood crow immediately began to retreat into the city with his troops.

As before, it persuaded the remaining two high-level Dark Gold Demons to leave a significant portion of their troops behind to delay the swarm in exchange for time to retreat.

But this time, its plans did not go as smoothly as before.

As the saying goes, if you eat a trench, you will grow wisely, and the broken wrist of the bloody warrior forced Zagala to abandon the tactics that had been formulated long ago, which was already a great shame for a high-ranking commander of the swarm.

It will never fall twice in the same pit, so it is ready to cut off the opponent's retreat.

Just when Blood Crow and the other two high-level dark gold demon leaders threw down hundreds of thousands of baits to block the main force of the insect swarm, but they themselves were about to retreat to the city with the main force of the demons, the cockroaches and lurker troops who had not made a move before suddenly appeared in front of them at this time, and blocked their retreat in one fell swoop.

The Purgatory Fortress itself is guarded by spells cast by the two demon gods themselves, and neither the pit worms, nor the cockroaches, nor even the Void Diggers can drill directly into the city from underground.

But there are no spells inside the city to protect the outside of the city, and the cockroaches have already dug a tunnel through the underground of the battlefield to the gate of the Purgatory Fortress, waiting to intercept the retreating demon troops.

And not only that, if the demon leaders such as the Blood Crow decide to forcibly break through, the cockroach troops will chase them all the way to the outside of the city gate.

When the time comes, if Shanke opens the door, the cockroaches will rush in and grab control of the gate at any cost.

And even if Shank gritted his teeth and didn't open the door, at least the swarm would be able to eat all the demon defenders on the other three lines of defense.

That's nearly fifteen million demons, almost half of the total number of demon forces in the entire Purgatory Fortress area.

If so many troops were gone, Shank would probably cry out at the head of the city......

Zagala sent out more than 4 million cockroaches and 1.2 million lurkers, and the mighty army of black armor surged out from under the ground, using the terrain in front of the Purgatory Fortress to firmly block the retreating demonic main force.

Of course, due to the absolute gap in numbers between the two sides, if the high-level dark gold demons such as the Blood Crow chose to rush strongly, the cockroaches would not be able to stop them.

But the lurkers who are hiding underground will teach the demons who try to break through their zone a lesson that they can't just tread on any land......

Faced with the interception of the cockroach troops, the Blood Crow, who knew that time was precious, finally chose to rush after some discussion with several other dark gold demons.

The huge demon legion formed a torrent of blood, forced through the defense line laid by the cockroaches, and then rushed towards the gate of the Purgatory Fortress without stopping.

And just as they broke through the defense line formed by the cockroaches and were about to accelerate their retreat, dense bone spurs suddenly burst out from under the ground, piercing the unprepared demon vanguard through the heart!

The rows of bone spurs that the lurkers stabbed out of the ground were like steel brushes that shaved flesh from the retreating demon army, and these deadly attacks from the underground quickly crushed the demons' already fragile nerves.

The retreat quickly turned into a rout, and the hordes of demons howled towards the Purgatory Fortress.

A group of dark gold demons caught in the demon group tried their best to kill the underground lurkers, trying to regroup the demon forces and retreat in an orderly manner, but at this moment, the cockroaches that had just been dispersed by the demon army used their ability to move to regroup, and egged on the spot, starting a new round of mutation.

After a few hours, after all the demons had escaped from the slaughter zone of the lurkers, the cockroach army, which had been reduced to more than 2.6 million troops, followed from the rear again.

But this time, this cockroach force is no longer purely composed of cockroaches, and it is also mixed with at least half of the exterminators who have just mutated!

The cockroach troops' tail-of-tail pursuit made the Blood Crow quickly understand the swarm's intentions, and it tried to send a force to disperse the stalkers, but the demon detachment was quickly defeated by a mixed force of cockroaches and exterminators.

The Blood Crow can't send more demons, and all the forces in its hands must be brought into the city to participate in the defense of the city, which is the last glimmer of hope for them to continue to live.

So it opened its primordial form, summoned an untold army of the dead out of thin air from beneath the earth, and used it to block the pursuit of the cockroach army.

Although these brainless necromancers were vulnerable to the cockroaches and exterminators, they managed to thwart the original plan of pursuit.

The demon forces escaped, and they managed to retreat into the Purgatory Fortress with the support of the demons and the weapons of the defenders in the city, despite the constant onslaught of the alien dragons who had escaped from the air battle in the rear.

However, due to the obstruction of the cockroach troops and the ambush of the lurkers, this original army of fifteen million demons actually entered the fortress alive, but less than 10 million were left.

Although the swarm also suffered some losses in the interception battle, the losses on the demon side were all even greater.