Although the energy within the sheltered area of ​​the city comes from gray fog, which is converted from suppression of the tower, theoretically, the gray fog does not dissipate, and the energy of the city is inexhaustible.

But for magic arrays, energy is not enough. After all, the range of energy that each magic array can attract is limited, and there will be an impact between adjacent magic arrays, which will lead to the speed of magic array gathering energy, which will not keep up with the consumption speed at all.

What's even more urgent is that the mental power of the spellcasters is no longer able to keep up.

Although the casters in this world rely on almost reaching the ultimate power of the magic array to increase the strength they can exert to a great level, it is also a price to control the power that exceeds their own limits. When manipulating spells, the casters have to pay three times their mental power to control the spells.

If you cross a large realm and manipulate spells, even with the assistance of the magic array, the caster's mental power consumption speed is already very fast. If you triple it, the consumption speed will be even more terrifying. From the time you activate the magic array to the present, in just two and a half minutes, all casters have been drained from their mental power.

However, this is enough. The first batch of soldiers who arrived at the temporary defense line of the periphery were veterans who had experienced many dark tide invasions. They had rich experience in how to deal with these gray beasts. After the casters blocked most gray beasts for them, the veterans quickly entered a state of combat, both physically and mentally.

When the casters ended the casting one after another, facing the impact of dozens of times the gray beast, the veterans still withstood the attack perfectly and did not lose the spell support.

Of course, the biggest contributor is the city defense equipment delivered to the third batch.

Previously, the Blue City transport team had already sent two rounds of supplies to the temporary defense line of the front line. The first batch was mainly various spell casting materials, as well as a small number of small city defense equipment, such as bows and arrows, crossbows, spears, flying axes, etc. The second batch of supplies was still mainly spell casting materials, and also brought some enchanted building materials to further strengthen the city walls of the temporary defense line.

In the third batch of supplies, except for a small number of medicines and ointments, all the rest are all kinds of city defense equipment!

At the same time, 80% of the transport team members remained on the front line and turned into engineering troops. Casting machines rose from the ground, and crossbows were set up on the top of the city. The casters even opened a row of small holes in the city wall, setting up the roar of wind and fire from the Ember Ring City!

This large city defense equipment, which was handed by a dwarf, is ferocious in shape, and is equipped with special fuel inside. The ignition of flames is even avoided by black beasts. The special nozzle, combined with strong power, can make the roar of wind and fire spray out fan-shaped flames up to fifty meters. Considering the number of gray beasts under the city wall, a spray can take away at least hundreds of gray beasts at one time!

"Is it too early to get on the Fenghuo Roar now?"

On the top of the city, the secretary's expression was a little hesitant. These Fenghuo Roars were bought from the dwarves. The group of dwarves were very smart. The price of Fenghuo Roars was similar to free gifts, but the special fuel it used was very expensive. Every year, Blue City had to pay a lot of resources to exchange for enough fuel with Embers Ring City.

"The sooner you use it, the better. Use Fenghuo Roar to burn money, but don't use Fenghuo Roar to waste your life!"

There was not much regret in Sawy's tone, but his plain tone shocked everyone around him, and a special feeling arose from his heart.

With the assistance of Fenghuo Roar, even though the frequency of flame ejection was not high, the pressure on the city was greatly reduced. At the back, the rain of arrows was shot from the city of Blue City again. The middle and low-level spellcasters who followed the transportation team to the temporary defense line of the front line also began to cast spells, making the defense line of the front line more stable.

The battle has become stalemate...

Or, it is entering garbage time.

The soldiers and spellcasters on the front line consumed physical and mental power, and various city defense supplies were used by machines, while the endless black tide consumed the life of the gray beast. For three days, the entire outer defense line was misty. It was the gray fog that turned into after the death of the gray beast. There were too many, so that the power of the tower could not be transformed in an instant. They could only temporarily suppress it into white fog that was harmless to the human body, which instead gave the front line an illusion of a fairyland.

Let's go, for the soldiers and spellcasters on the front line, as well as the adventurers who joined later, this is definitely not a fairyland.

Resisting the little black tide is not as dangerous as the ordinary black tide and the super black tide. When fighting, you only need to mechanically wave weapons or build spells. You will not be replaced by others until you use up all your strength and have exhausted your mental power or are injured accidentally.

Simply put, it is extremely boring. The only entertainment event is the "sound and light show" of the strong men who rushed out of the city wall.

After confirming that the defense lines in various places were completely stable, Saoya rushed out with a strong man. More than 300 titled knights, thousands, thousands of big knights and knights, one by one, fell into the tide of gray beasts like meteorites.

Facing the crowds of gray beasts, the knights were not afraid at all. The knights of their own strengthening roared, their bodies skyrocketed, and turned into small giants three or five meters high, which was more like ferocious beasts than violent beasts. A simple straight punch and a single step can take away the lives of several gray beasts.

What is even more eye-catching are the armed transformation knights. When they gathered their arms, they completely gave up their mass and pursued their body shape to the extreme. Each of them waved weapons more than ten meters or even dozens of meters long, and carried weapons and turned around, and there was a blank around them.

Of course, there is also our son of the world, Gregory, who was wearing flame armor and holding the flame certificate. His body also expanded to more than five meters high with the support of the power of original fire, as if the God of Fire descended to earth. Each attack could bring out a flame storm. The rising flames were covered with a layer of white mist, turning into a walking flame hell.

The most eye-catching ones are Sawyer and the other two lords.

The mystery understood by the two lords belongs to their own strengthening system. After rushing into the beast group, they directly transform into giants more than ten meters high. They do not need any skills to deal with gray beasts. They just need to walk around to bring about death.
Chapter completed!