[Flame Charge] The Fire Drake rapidly approaches King Leon while its body is covered in flame. Before the impact, King Leon disappeared once again from his spot [Blink].

Missing its target, the Fire Drake couldn't stop its momentum and keep running until a few hundred meters away.

​​

Using this opportunity, King Leon appears in front of the wounded Fire Drake. Without wasting any moment he stabs his sword towards the wound. An illusion of a giant sword manifested behind him and embedded into his sword [King Gladius]. *BAM*

The sword pierced its body and created a big hole. At this moment, the wounded Fire Drake immediately fell on the ground lifelessly.

Although Fire Drake is a very strong grade five monster and created a lot of trouble towards Jacob and his party before, it still did not match against grade seven combatants such as King Leon.

Even King Leon didn't use his elemental attack, it is still enough to slay the Fire Drake. This shows the big difference in power between grade six combatant and grade seven.

This is why grade seven is hailed as a legendary figure because not only are they hard to get but also their unbelievable might.

Looking at the fallen Fire Drake, "YEEAAHH!!" all the soldiers cheered at King Leon's achievement.

During this time, the other Fire Drake enraged as its partner was killed by the small human in front of it. Once again it uses [Flame Charge] towards the human king.

While the Fire Drake and King Leon clashed with each other, the other soldiers also kept firing spells and projectile weapons towards the endless tide of monsters.

Although many monsters died and were heavily injured from the Fire Drake's fireballs and its fight, there are still countless monsters that are coming towards the Fortress.

Now, the monster tide mostly consists of third and fourth-grade monsters that could withstand the aftershock of the Fire Drake fight nearby.

This monster is the true force of this monster army. Jacob and his friend could easily kill these monsters. However, thousands of these monsters keep coming towards the Fortress.

"Keep Firing!! Push them back until the King kills the Fire Drake!!" command Borkins towards the other soldier.

The monster already reached the Fortress wall. Since they couldn't destroy it, they are forced to climb the wall using various kinds of means.

During this time, an explosion suddenly happened on the top of the wall. From the explosion, a black reddish humanoid monster killed the nearby soldier.

"Corrupted Fire Elemental!! Soldier!! Charge!!" as Borkins leads the soldier to fight against these monsters.

Like a breaking dam, soon more monsters managed to climb up the wall and begin to create chaos on the upper wall. The monster in the upper wall creates a distraction and disrupts the projectile attack towards the other monster.

"Jacob, give me some time!!" said Duke Blue as he began casting high circle spells.

Hearing this, Jacob immediately helps the nearby soldier to fend off the monsters. However, all this monster has strong fire resistance. The Duke needs to expend more mana to kill all these monsters.

Especially the Corrupted Fire Elemental that could absorb fire elements to heal themself. Fortunately, Sylvan is already back at this moment and helps the others to kill the monsters.

After a while, "All things in the world turn to ash… Everyone brace yourself!! [6th Circle - Firestorm]

Duke Blue claps his hand before raising it and creates a huge magic circle above the Black Fortress. From the magic circle appear many small blue flame sparks that keep hovering around the Fortress.

Soon, these blue flames become bigger and engulf the entire Black Fortress along with the area nearby it. All the monsters who touch the blue flame immediately turn to burn and turn to ash despite their high fire-resistant.

Even the Corrupted Fire Elemental couldn't resist its heat and was destroyed by the blue flame. This shows that the blue flame is hotter and more powerful than the ordinary flame.

Moreover, the blue flames didn't harm the soldier and the fortress. Such fine control of spells is very hard to even for a six-grade combatant. Still, duke Blue managed to do such an impossible feat.

Looking at the burning monster, "What a superb control of spell and element. Even for the elves there are only a few who could do this kind of control especially in this large space." said Sylvan.

After the blue [Firestorm] recedes, the soldier gains a little bit of breather and goes back into their position to release to attack the endless tide of monsters.

As for Duke Blue, he is slumping on the ground with a pale face. Controlling large-scale and high circle spells truly exhausted him in body and mind. If it is not because of his strong will under years of battling in many kinds of war, he may already have fallen unconscious.

Using his remaining strength, he drinks some potions to rejuvenate himself. Still, his power is dropping a lot more than before.

However, the strict duke refused to back down and keep assisting the soldiers from behind. As a duke, he knows that each of these soldiers could potentially become someone greater one day.

During this time, "ROOARRR" a roaring sound heard from the Fire Drake's location.

After a dozen times clashing one with each other, the other Fire Drake is finally slain by King Leon.

"What a persistent lizard." said King Leon as he looked at the lifeless Fire Drake.

Then, the king disappeared and arrived at the Fortress using a blink. Looking at the exhausted face of Duke Blue, "You look terrible, Olven."

"Haa.. Ha.. This is nothing, my lord. I could still fight." replied Duke Blue.

"Good… Soldier of the Heart Kingdom, show them the might of Heart Kingdom!!" shouted King Leon.

"YEAHH!!" cheers the soldier.

The presence of King Leon raised the morale of the defending soldier. They fight more zealously than before. They feel that as long as their king is here, they are not unbeatable.

On the contrary, the monster keeps coming without regard to their life like a moth coming towards the flame.

Hours passed by and soon the sun began to set while the battle against the monster continued. Fortunately, there is no other grade five monsters coming from the forest.

Still, the King sometimes needed to step in to give the soldier time to take a breather and shift their position. The hardest part of fighting against monster waves is not to kill all the monsters but to withstand the attack of the endless tide.

Various kinds of monster corpses lay in front of the Fortress wall. It soon became a stepping stone for other monsters to climb the fortress wall.

Despite the endless tide of monsters, the high-level combatant and King Leon feels relief. It's because the main preparator of Monster Overlord is not coming towards this way.

Otherwise, the monster overlord will already appear a long time ago when King Leon kills the two Fire Drake.

"RUF… VARR… SOR.. FUE…"

After some time, an echo of the chanting sound was heard in the air. All the high combatants immediately become vigilant towards the surrounding. But, they couldn't find the preparator.

The chanting sound is also not in the common language and seems like gibberish. Despite the clamoring sound from the fight, everyone could still hear the chanting perfectly.

Hearing the chanting, Priest Sara who is tending the injured soldier feels a dread feeling towards this. But, she still couldn't find the source of the chanting.

"RAAS.. VON.. SURVANT.. END… [Arise Children of Miasma]" soon the chanting came to an end. *Boooo* *ROAARR*

As the chanting came to end, they heard a war horn and a monster roar. To be exact people all over the Firuman heard this.

Suddenly, a thick black tendril coming from the forest and ground. The black tendril entering the monster corpse. Soon, all this corpse comes back to life. All the monsters have red eyes and their skin is black colored.

"I-Imposible.. A-All of them become undead." said Priest Sara looking at the impossible thing in front of them.

Undead is a creature that is not alive and also dead, they are usually created and controlled by someone. There are various kinds of spells to create undead. However, because of the difficulty of controlling the undead body, only a few people are capable of doing this.

The strongest of these spell practitioners could only control not more than ten. However, thousands of monster undead keep being resurrected. Moreover, the monster also looks as strong as when they are still alive.

Then, the resurrected monster once again comes towards the Black Fortress. Looking at the resurrected monster, Jacob drinks a mana potion before flaring up his mana.

He manipulates the thick fire element in the surrounding and instacast [Fire Wyrm] to burn all the resurrected monsters. Although undead is bizarre creatures and instills fear towards others, they have a lot of weakness.

One of them is as long as their body is destroyed they will be dead permanently. In terms of destruction, fire elemental could be said to be one of the best elementals for this job.

On the contrary to Duke's expectation, the burned monster keeps regenerating and moves forwards while ignoring the Fire Wyrm. Some of them could even withstand the fire without getting burned.

"T-This.. They retain their trait of having fire resistance." said Jacob.

*ROOARR*