The biting cold wind carried dirty black smoke and a choking stench that enveloped the fortress.

The gloomy sky seemed to be about to take away all the sunshine and gradually darkened.

In the distance, beyond the barrier of the raging fire, darkness enveloped the forest.

The first thing that caught people's attention was the wolf's howl.

The high-pitched voice penetrates people's hearts and triggers the deepest fears in the human heart.

A strong wind suddenly swept in.

From the watchtower, one could see the dense treetops of the Black Forest swaying and undulating like waves. Accompanied by the howling of wolves, the waves of the sea of ​​trees surged towards the direction of the Black Castle.

Suddenly, the darkness expanded.

The sound of trees breaking could be heard from a distance.

The trees covered by black shadows fell apart in an instant, and the debris swirled and blew in the sky along with the cold winter wind, as if one could see the entity of the strong wind.

This is indeed the case.

As the sky gradually darkened, the strong wind seemed to take shape.

It was the most magnificent cloud curtain that Lu Ban had never seen in his life. It stretched across the Black Forest like a wall. The clouds and mist were swirling visible to the naked eye. If it happened on Earth, it would definitely be a super typhoon that was stronger than a super typhoon.

It was such a huge storm that I couldn't even see its entirety.

It was completely dark.

A crimson moon rose at some point.

Alluring and deep red, like coagulated blood, the light of the red moon sprinkled down, making the entire Black Castle Fortress appear in an eerie crimson color.

The air was getting colder and colder, and white frost immediately condensed on the leaves, which, accompanied by strong winds, felt like being cut by a knife.

"The devil's tide is coming."

Jonah said half in emotion, half in shock.

"Go back to Blackburg. When the frost arrives, the air here will drop to a very low temperature in a short period of time, where water will freeze into ice."

Lu Ban saw a group of scattered birds in the distance. As the strong wind blew through the flock, the birds were frozen into ice sculptures in mid-air and were swept away by the wind and flew high into the sky.

When the wind blows across the top of the forest, you can see that the treetops that were originally swaying in the wind suddenly freeze and become fixed in a crooked state.

Even the blazing forest fire was frozen in an instant. The high-speed freezing caused the sound to disappear, and death spread in silence and speed.

Those who were still outside the fortress immediately dropped what they were holding and ran towards the fortress.

Lu Ban and Jonah also ran towards the fortress.

Glancing back, Lu Ban saw that the wind was already within reach.

Buzz——

The cold wind hit the fortress's magic barrier, and a layer of white frost immediately condensed on the outside of the invisible barrier. However, it could not completely block the strong wind, and many rangers running behind were still lifted up and rolled into the sky.

However, the only thing that might be considered fortunate was that they died of the severe cold shortly after leaving the ground and did not have to feel the pain that followed.

Lu Ban and Jonah ran into the fortress gate which was slowly closing.

As the door closed, the cold and terrifying scene seemed to disappear briefly.

But then, there was a loud bang.

Bang——

The entire fortress shook as if something was hitting it.

Lu Ban and Jonah came to the lookout and could see that despite the obstruction of the magic barrier, the wind carrying stones, wood chips, and soil was still hitting the fortress. From time to time, huge stones would come crashing down accompanied by the cold wind. Some were blocked by the magic barrier, while others penetrated the barrier, hitting the dome of the fortress and shaking the entire building.

Suddenly, all the sounds disappeared.

Lu Ban could only see the huge storm "slowly" rotating and gradually expanding, with the clouds almost covering the blood moon.

Then, darkness fell.

Silently, the darkness spread.

Frozen trees, fallen rocks, and animals turned into ice sculptures were all swallowed up by the darkness.

The world suddenly turned into black and white.

As far as Lu Ban could see with his naked eyes, there was nothing left. There was only endless darkness covering the entire forest.

The crystal stone above the Black Castle Fortress burst out with light, trying to dispel the darkness, but the light seemed to be swallowed by a monster and could not penetrate any further.

The storm moved toward the fortress, suffocating it.

"The magic barrier won't last long. We'll soon have to face a head-on battle with the monsters. Of course, that's the best scenario."

Jonah laughed at himself.

"What's worse?"

Lu Ban asked subconsciously, but soon realized it himself.

"If the defenses are breached, it won't take the Eternal Night's followers an hour to devour the people in this fortress, not to mention that with this cold wind, the plague may have already sneaked in. Even if the frost doesn't appear, we will lose more than a third of our people just by relying on these two demon tide outposts."

Jonah spoke the cruel numbers.

"I need to go to garrison. Mages are still useful at this time."

At this moment, Lu Ban saw a ray of light appear in the boundless darkness.

It was a position almost level with the Black Castle Fortress, extremely far away from here. A ray of light shot up into the sky like a sharp sword, cutting through the darkness.

"That's another fortress. There are more than a thousand fortresses of this size, and the number of small fortresses is five times this. These fortresses constitute the final line of defense of the Black Tower."

As Jonah spoke, more light shot up into the sky.

Some of the light beams are so thin that they are almost swallowed up by the darkness, while some are so thick that they can even illuminate some surrounding areas.

If you look down at the Black Forest from a high altitude at this moment, you can see that in this forest surrounding the lit human civilization area, countless points of light are flickering and swaying like stars.

These are the stars of human civilization.

"The Grey Tower's final defensive spell. Once the light goes out, the darkness will completely engulf us. In other words, if a light goes out, it means that the fortress has fallen."

Jonah was already on the stairs.

Lu Ban followed.

The howling of wolves was heard again.

"Eternal Night cannot break through this spell, but Frost can. Tangible things can directly destroy the fortress. This is why we have to guard here."

Jonah arrived at the hall located above the fortress.

In addition to the mages, there is also the commander of the fortress. Lu Ban saw that the commander of the previous sentry troops was also among them.

In the center of the hall, there are three high-backed stone chairs standing back to back.

There were already three mages sitting on the high-backed chairs.

It's just that they don't look like leaders, they look more like...

Lu Ban saw that the young wizard's face was full of pain and distortion, his eyes rolled back, his whole body twitching, and he almost used his last will to force himself to sit on the bench.

His body was burning.

The silver-white flame was made from the mage's body. It had no temperature, but it lit up the hall.

Three flames rose up in an interlaced manner, rushing straight to the dome, where fire and light were released, breaking through the fortress and rushing upwards.

Lu Ban now knew how the light pillars of these shelter fortresses were produced.