Harry Potter: Dimensional Wizard

"Morgana, give me a preliminary analysis."

"Yes, master…According to my analysis, the Floating City has barely reached a Tier 10 Weapon."

"Barely?"

"Yes. A Tier 10 individual has enough power to destroy a universe with one move. Meanwhile, the floating city would need between 2 to 5 attacks."

"I see. Anything I need to pay attention to."

"Yes. One Aether Core is not enough to sustain the energy required to operate. You need at least three of them or optimize the current core."

"I figure this might be an issue. I'll deal with it. Anything else?"

"Yes, you need to test the new Energy Conversion System as there seem to be some problems with so much energy interacting."

Edward checked the data, and she was correct. Once the Floating City began to harness a tremendous amount of energy, the converter enchantment began to malfunction.

"This only needs more trial and error to modify, so you can deal with it. You're also in charge of installing the technology system. Just show me the final result."

"Yes, sir."

Edward proceeded to work on the Traveling System. With the recent development of Void Energy, he can travel instantly to anywhere as long as he knows the coordinates. However, the system still had to be fine-tuned.

He called Rowena to help him and to see if she could modify and improve the process. And she did. He also took this opportunity to spend some alone time with her.

Once the process ended, he tested. He activated the city and entered the void. As he looked at his environment, Edward felt something different despite not being the first time he was here.

"I'm truly lucky."

Edward knew if it were not for that Void Tear he discovered in Rowena's timeline, he would not have so quickly discovered Omniverse Travel. The best outcome was that he would have found the Astral Realm and other planes.

As for how he could leave the Source Wall and enter the Void, he might have to wait until he reached Tier 12.

"It doesn't matter. Luck is also a part of success."

He activated the city and instantly appeared outside of the Konosuba Universe. He started it again and appeared in the Full-Metal Alchemist Universe. Edward proceeded to revisit all the places he traveled to before returning home.

"Next is the Karma Empowerment System."

The way he planned for the floating city to reach Tier 10 was through the use of Karmic Empowerment. Luckily, his research, Hermione's, and Lily's Arcane Spark made that possible.

His design is to fuse the Underworld and Elysium from Black Clover into a super Arcane Spark for the entire system, allowing it to use Karma Empowerment to boost all its systems–including the attack mode.

For this system, he called for Hermione and Wiz's help. Hermione was currently interested in studying Karma and was even trying to build a Karma Staff with Karma Authority. Meanwhile, Wiz was naturally gifted regarding things of the opposite nature, similar to Yin and Yang.

So, she was a great help when Edward had to ensure Elysium's positive Karma and the Underworld's negative Karma were perfectly balanced in the Arcane Spark.

The final result was a black crystal the size of a ten-story building floating above an empty room. Immediately, Edward entered the Void to test the effect.

"You've succeeded, boss. The Floating City is a Tier 10 Weapons."

"Indeed. Let's get more data."

Edward then traveled to a parallel universe before entering the Mirror Dimension of that timeline where there was no life. Then, after waiting for the Aether Core to recharge, he activated the Divine Spark and fired.

The sight he witnessed was both beautiful and scary. An entire universe, comprised of infinite planets, stars, and galaxies, vanished in seconds. All matter, particles, dimensions, energy, and spirituality, vanished from the face of existence.

'What a scary world we live in,' thought Edward before leaving. After returning to his timeline, he continued his work. He had one thing to add before dealing with the energy issue.

He installed a Rebirth Pond in the city, which he took from Eve's Elysium. A new angel will be born by placing a pure soul in the pond. He even created another birth that gave birth to devils.

'With this pond, I will have a Demon and Angel Legion. Adding to the Golem Legion, the Floating City is a walking armed civilization.'

"Next is the Aether Core."

"Boss, I've discovered something," said Morgana, who suddenly appeared. Then, she showed him a video of the Arcane Spark. Edward saw it was absorbing a bunch of black and white lights.

"What's this?"

"Positive and negative emotions. The Divine Spark can naturally absorb these emotions and convert them into karma."

"Really? That would deal with the issue of slow growth."

Unlike Arcanist's personal Arcane Spark, the one in the city is based on Elysium and the Underworld, which had the natural ability to generate positive and negative karma. However, the process is very slow, so Edward has to be careful about how much karma he uses for empowerment.

But now, he no longer had to worry about this issue–especially since there were plenty of emotions during this war.

"An unexpected but welcome development. Test and gather more data."

While the little elf did that, Edward proceeded to deal with the Aether Core. Because of his Divine Artificer Title, he had Unlimited Stamina when forging, so he did have to take a rest.

The first thing he did was create a second one. Normally, this process was tedious and required a lot of effort to gather so much mana from the leylines.

However, he could now directly absorb mana from the Mana Grid. So, creating a second Aether Core only took a few days. The next step was to optimize the original core.

Edward called Aqua for help. The Water Goddess had an uncanny talent for purification, making her perfect for this task. Of course, Edward had to bribe her for her help. To be exact, he almost tricked her into helping for free, but Kazuma interrupted him, forcing him to pay for her service.

So, after putting a curse on him that would make his life miserable for the next month, he took Aqua away. He immediately plugged her into the second Aether Core to elevate her purification powers.

Then, he had her purify the original core while absorbing a large quantity of mana from the Grid. And his method succeeded. With the mana quantity and quality drastically increased, the Aether Core elevated to contain Tier 10 energy.

Edward also took this opportunity to gather enough data on purification to ensure he would not need Aqua's help when he wanted to create a second Tier 10 Aether Core.

"Truly a masterpiece, boss," said Morgana as she looked at the final result.

"I know, right? However, we shouldn't be too proud since this is nowhere near the pinnacle of Artificer. Alright, let's add the blocker."

Edward went to add a few more enchantments to the city before activating them. Then, nine black magic circles appeared above the city, sending an invisible energy wave throughout the galaxy that no one could detect.

Only Guddnad felt something had occurred, but he could not detect the origin or the exact change until his follower came rushing into his throne room, telling him something significant had happened.

The galaxy had lost connection to the Universe Web. And Guzznad was not the only person who received the news since everyone used the Universe Web for communication.

Meanwhile, the perpetrator of this incident also received the news.

"So, it worked," said Edward. The blocker was simple as an idea. The Mana Grid exuded a unique frequency.

As such, if he used some energy to disrupt that frequency, it could disturb the communication properties that the Tier 10 Gods used. And from the information he received from the future, Anti-Magic was the best power to use as a counter.

So, Edward accessed the part of the grid that flowed throughout the Milky Way Galaxy and disrupted it. That way, the Grid will remain intact in the other part of the universe but rendered useless in the Milky Way.