Lord of the Sky City

As for Kasin City, Karina is indeed quite familiar with it. She was the one who discovered this city and found the Moving Fortress here, so there's no need for a lengthy introduction about the city.

So, when Rocky asked her about it, Karina stood up as well and stood beside him in front of the sand table.

"It's too big, bigger than Mist Mountain City."

Looking at Kasin City on the sand table, Karina recalled her previous trip to Kasin City and then pointed out a key issue: the city is too big.

What she said was the truth and, more importantly, the main point.

Although Kasin City is located in a remote area, it is a major city of the Wanzhong Kingdom, with an area twice as large as Mist Mountain City, which will be key to whether Rocky can control Kasin City.

As the battles from this counterattack war show, capturing a city is not particularly difficult. The real challenge lies in how to defend a city once you have taken it, and that is the true hurdle.

Based on Karina's experience in this counterattack war, the larger the city, the harder it is to defend. The larger the city's area, the more resources necessary to put into defense, and even the Allied Forces find it overwhelming, let alone Rocky.

The reason the Allied Forces were able to continuously control three major regions was not that they had enough troops stationed in each city but because their movement speed was fast enough. Each time they captured an area, they quickly occupied all the cities within it and then deployed a large army to sweep and clear all the demons throughout the area comprehensively, thus reducing the defense tasks for each city significantly.

But Rocky clearly cannot do this. With his capabilities, even with Karina and the Mairente Family, it's impossible to clear the Broken Sky Peak area. Without such a large-scale sweep, the number of demons in the area will not decrease. So even if Rocky occupies Kasin City, he will still face endless attacks.

The area of Kasin City is again so large that Rocky does not have enough defense forces to deploy for defense, and the final result will be that even if he can conquer the city, it won't take long before demons will drive him out, and this result will remain the same no matter how many times it repeats.

This is actually what makes Rocky's situation difficult. Since he intends to capture Kasin City, he has gone there personally more than once to survey the city; he also found that Kasin City is indeed too large. Trying to defend such a city is practically impossible without a defense force of tens of thousands, but even if he were to pour all his forces into it, along with those of Karina and the Mairente Family, he still could not muster a defense force of tens of thousands.

"I do have an idea..."

Just as Rocky was feeling helpless, Karina spoke up.

She stared intently at the sand table for quite a while before continuing, "If we make the city a bit smaller, we might be able to defend it."

"What... did you say?"

Hearing this, Rocky looked at her, clearly not understanding what she meant.

Then Karina explained in detail: "If it's the current Kasin City, we definitely can't hold it, not just because we don't have enough people, but also since the city's original defensive fortifications have long been destroyed, there's simply no way to defend it."

"But if we can make the city smaller—in other words, build an inner city within the city and defend through the inner city—wouldn't it be much easier?"

"You mean... a city within a city?"

"Precisely!"

Nodding, Karina confirmed that this was indeed her intention, and Rocky frowned in thought for quite a while afterward.

This idea is indeed intriguing—rebuilding defensive fortifications within Kasin City to form a city within a city. This would naturally ease the defensive pressure significantly, and because the defensive fortifications are newly built, not only would the pressure be lighter, but the strength would also be higher during defense.

This is certainly a good solution!

After pondering for a moment, Rocky nodded, finding Karina's suggestion highly feasible. So he immediately summoned Liliya, asking her to get in touch with Master Wynn, who had previously upgraded Thunderhawk City, and have him come to Thunderhawk City again.

As an expert in upgrading Sky City, Wynn has a deep understanding of city defenses. Back then, he proposed many suggestions for the defense fortifications of Backhill Village, so if a city within a city is to be built in Kasin City, he is the most suitable person for the job.

Once all these arrangements were made, Rocky looked at Karina and then asked, "Are you interested in transforming Rose City?"

"Oh?"

Hearing this, Karina's eyes immediately lit up. She had long heard about the city armament modifications done on Thunderhawk City and was aware of the impressive achievement Thunderhawk City had after the modifications, wiping out six cities outside the Eternal City. So when Rocky asked this, she nodded right away.

"You mean the City Armament Plan? The one master Orton is leading?"

"Yes, if it's you, maybe the teacher would be willing to help you transform Rose City."

"That would be great!"

Knowing that Rocky was willing to modify her Rose City for city armament, Karina was more than willing.

"But you have to cover the costs."

"Of course, no problem, absolutely no problem."

Without hesitation, Karina nodded, completely unfazed by the costs. Ever since Rocky waged a massacre outside the Eternal City, wiping out six cities, many have been curious about why Thunderhawk City possesses such formidable combat power. It later became clear that Master Orton's early concept of the City Armament Plan had succeeded, leading many to want to understand the plan's ins and outs and retrofit their cities accordingly, but none succeeded, not even the Magic Energy Research Institute.

In fact, the Magic Energy Research Institute is the most vexed by this because Master Orton initially undertook this plan with the Institute's backing, only for it to fail. However, after witnessing Thunderhawk City's prowess, when the Institute retrieved the old research files, they found the results were still failures, and then people realized the success of the City Armament Plan was due to the use of Rune Technology, so outsiders shouldn't hope for it; Karina is no exception.

Although her relationship with Rocky is very good, she knew this technology must be Rocky's most crucial secret, so she never tried to inquire, fearing it might damage her relationship with Rocky. She believed that when Rocky was willing to share this technology, she would be among the first to receive it.

But the reality was better than she had envisioned. Even though Rocky didn't plan to share this technology immediately, he wouldn't shortchange those like Karina, who were willing to abandon the Allied Forces to help him.