"Idiots…"

Vincent muttered under his breath as he saw the tragedy happening in his eyes. He was able to see how Lesley rushed in and how they got instantly cornered.

He clearly remembered that Yulia did not give such a command but Lesley's group still decided to become heroes only to end up in their current state.

Patriarch Leon, who saw that his daughter was in danger, no longer cared about the orders and dashed towards the Airship's deck to save her…

Although he can only do Dual Casting, he is still a Grand Magus that has achieved a mutation in his mana…

"Wind Razor… Wind Haste…"

Two Wind Attribute Mana Arts were used as he arrived near Lesley so quickly…

The spear-like roots and vines were easily cut off by his Wind Razor but they just quickly grew since the area they are in right now is the nearest to the core…

Regeneration is extremely fast in this spot compared to the edges of the surrounding field created by the huge and towering Treant.

Wind Razor! Wind Razor!

He continuously cast the Mana Art and was indeed successful at first… However, the remaining enemy Adept Mages used Mana Bullets to disrupt him.

"Tsk! You pests!"

Leon grunted as he grabbed Lesley to his side. Although the Mana Bullets won't hurt him because of his Magician Robe, it would disrupt him from casting Elemental Mana Arts…

Thud! Thud! Thud!

Six Mana Bullets hit his back as several vines and roots started blocking his path…

Whom~

At this time, a beam of light blinded him for a moment but it created a path for him to escape while carrying Lesley…

Apparently, even though Lesley wasn't pierced to death by the spears, she had been shot by tens of Mana Bullets from the Adept Mages of the enemies… Three or five of them may not be a huge problem but once her Mana Shield dropped, the Mana Bullets would still damage her internal organs… It is not something that her armor can block that relies on its durability.

Anyway, the beam of light was from the Mage Battalion which decided to support their retreat.

Leon used this opportunity to escape but not before he cast a glance at the Adept Mages who dared to hurt his daughter.

The four Adept Mages saw a single Mana Bullet released from the Grand Magus' fingertip…

Thud!

They decided to hide behind the roots of the Treants again and wait for an opportunity… However, they didn't expect that the released Mana Bullet would move freely in the air as it pierced through their throats!

One Mana Bullet killed four Adept Mages with a single Mana Bullet, a Tier 2 Mana Art!

"Hmph!"

Seeing that the Adept Mages died, Leon continued with his retreat as the Treant tried catching up to him.

These Adept Mages were only able to survive the Vanguard Force because they were completely wrapped by the Treant's roots so they were hard to recognize. Now that they revealed themselves, they were easily killed by Leon, a Grand Magus, that is certainly experienced in killing lower-level Magicians.

As the Mage Battalion continued cutting off the expansion of the treant… They suddenly heard a huge explosion from inside the Airship…

The huge Treant that was previously rigorously expanding suddenly stopped and it turned lifeless!

At last, the main team managed to destroy the Treant's core!

It took them quite some time but it is still a successful mission…

Vincent, who was thinking of making a move to help everyone couldn't help but smile and celebrate with the rest… Although there were some casualties in this battle, Vincent was able to tell that they were able to limit it greatly thanks to Guven's abilities…

If not for him, these members of the Black Magic Organization would've certainly caused more trouble than what happened today.

After all, if the core of the Treants was placed elsewhere and not inside this confined space, it would certainly be a lot bigger and harder to deal with…

Furthermore, after using his Item Sense ability, he was able to find many suspicious objects inside the airship that might really destroy the internal situation of the city…

'Ahhh…' As soon as he reached this thought he immediately contacted Calidia to monitor the surroundings outside the city.

After all, if this airship was the Trojan Horse that was planning to sabotage their defenses, then there might be an external force that is waiting outside their city!

Then, he informed the magicians to be careful of handling the items that were thrown everywhere after the airship exploded.

There might be some dangerous items included so they have to be mindful of them.

***

"Huh? What's the problem this time?"

Half an hour after subjugating the Alchemists or members of the Black Magic Organization, Vincent heard that a disease seem to be spreading inside the city…

He had just come out of the Kayser Tower when he heard this report. He was about to send the Celestials to scout the surroundings of the city but this news halted his plan.

"At the moment, we've noticed that only those people who fought in the dockyard have been affected. This includes the people who had entered to clean up the area." Yulia reported as she also managed the reconstruction of the dockyard…

"Hmm? Does it mean that it came from the airship? Did they carefully handle the materials there? That airship is not only owned by the members of the Black Magic Organization, but it's also something owned by the Alchemist Union. It must have some dangerous items inside that did all this." Vincent muttered as he heard Yulia's words.

"Yes… We also considered that and sent Lady Dianne to check to assist and find the root cause. For now, she still studying the symptoms caused by the disease. Once she identified the disease, it will be a lot easier for us to cure the infected."

Yulia replied as she also explained the symptoms… Itchiness of the skin, fever, nose bleeding, shortness of breath, and unusual fluctuations of mana as if your mana source is being attacked.

"Dianne? Isn't she helping Faviona with her concoction?" Vincent asked,

"It seems that the critical part is already over so she allowed Dianne to leave. However, Severin is still inside the laboratory so he can learn from the Tier 5 Alchemist…"

Vincent nodded in understanding. Anyway, Dianne may only be an apprentice but she can't be a normal apprentice considering she's learning from a famous Tier 5 Alchemist.

"I see… However, I'm curious why our Health Recovery Potions weren't effective this time?" Vincent asked.

"Yes… I'm not sure why but Dianne mentioned that not all diseases can be cured by health recovery potions… She mentioned something about treating injuries or external wounds being different from treating diseases."

Yulia answered and noticed Vincent's frowning face.

"We should be fine. Only weaker magicians are affected. It means that it's not a very strong disease… As long as we give Dianne enough time, I'm sure that she can cure this disease even without Faviona's help." She added.

Vincent agreed with this and decided to assist with the contamination of the spreading disease.

He made sure that anyone who shows the symptoms of having the disease would be sent to the isolation area…

'The situation is not good… If there is an enemy force waiting to attack outside the city, it would be very troublesome to deal with them…' Vincent mused as he patiently waited for the result of Dianne's investigation…

About two hours had passed before a piece of good news was finally heard.

During this time, about eight people started having severe symptoms. The most that their health potions can do was just to alleviate a few symptoms or delay the disease from spreading further in their bodies.

Vincent also has no other way to cure them since it seems like it requires a specific type of pill or medicine to cure them instead of just a strong healing medicine.

"Dianne has finished her diagnosis… She reported that the disease seems to have attached to the person's mana source… She mentioned something about corruption… She's looking for you regarding the method that she needed to cure these people. It doesn't seem simple…"

Rufia, one of the magicians who had assisted Dianne, worriedly reported to Vincent.

"Corruption? What does she need to cure the patients?" Vincent asked as he followed her to where Dianne is currently at.

"She said that she'll tell it to you… I only heard that she might need the Kayser Tower's help regarding this."

Vincent felt curious after hearing this.

'She needed the Kayser Tower to cure patients instead of miraculous ingredients to make a pill or potion?' He thought.

That was quite unusual but Vincent did not ask any more questions.

As soon as he saw Dianne at the hospital, he didn't even ask about the situation and she immediately went to speak with him.

"Sir Vincent… The situation is not good… We're dealing with a very strange disease that erodes someone's Mana Source. Almost everyone I checked is affected. This included the Grand Magus and Grand Knights!"