Director Ken looked down at Ren Isana and spoke slowly to Natsuki, "Keep a close eye on this child. If anything goes wrong, notify me immediately."
After saying this, Director Ken vanished from the spot. He had constructed this Magic Circle himself; if a problem truly arose, only he would be able to handle it.
Natsuki nodded. She said nothing, her eyes fixed on Ren Isana as he grew stronger below. This guy was truly ridiculous; he had actually managed to satisfy such difficult conditions.
Ren Isana was oblivious to all this. He was currently immersed in his own world as divinity continuously flooded into his body. His strength grew, and his energy density rose steadily.
Furthermore, Ren Isana clearly felt that this divinity was attribute-less. In other words, he could transform it into whatever attribute he desired.
It wasn't the specific divinity Apollo carried. This discovery delighted Ren Isana; once things entered his body, he could mold them however he pleased.
It was hilarious. Ren Isana had used his [Jianjigu] to copy Yukino's talent; once this energy entered him, he immediately let it know who the master was.
Time ticked away. Ren Isana spent the following days eating and sleeping within this space. Once he realized he could perfectly control those powers, he didn't panic at all.
He just lay there. By the end of the first day, Ren Isana had successfully broken through to Tier 6. His strength continued to soar. This feeling of leveling up while doing nothing was simply too intoxicating.
While Ren Isana was leveling up like a madman, Asuna and the others were doing the same. After entering the Dungeon, they began a slaughterous rampage.
Even without Ren Isana, everyone was intimately familiar with the Dungeon. Moreover, the group was operating in teams of five, with veterans leading the newcomers, so there were no issues.
As long as they didn't do something suicidal like summoning a special boss, they were practically an unstoppable force in the Dungeon.
What if they met someone they couldn't beat? No worries—level up on the spot and then go all out. Not to mention Ais Wallenstein was with them, so they were never in any real danger.
Ren Isana stayed in that massive altar space for an entire month. During this time, he ate, slept, and lived there as if he were in prison.
Natsuki brought him food every day. As for bathing, he could forget about it. To avoid wasting his progress, he had to endure. Bored out of his mind, Ren Isana even tinkered with several spells.
For example, [Cleaning Magic] to keep himself spotless, and a spell to instantly digest food into energy.
Consequently, even though a month had passed, Ren Isana remained pristine. He could even control his beard growth through his abilities, keeping himself entirely clean.
Ren Isana was currently sensing his internal state, his face filled with joy. Today, he had successfully broken through to Tier 7 and possessed a powerful divinity.
Beyond that, he had obtained Apollo's Authority: [Incarnation of the Sun]. As long as he stood under the sun, Ren Isana possessed inexhaustible strength and unparalleled immortality!
Even if he died, as long as his body remained, he could instantly resurrect the moment the sun rose—provided he didn't seal his own power.
That kid Apollo only died because his Divine Power was sealed; he hadn't even had time to unseal it before Ren Isana stabbed him. Combined with the fact it was night and there was no sun, he had been cosmically unlucky.
"My luck really is good... I had the right timing, the right place, and the right people on my side. Otherwise, I really wouldn't have been able to kill that Apollo guy." Having obtained this Authority, Ren Isana realized just how lucky he had been.
Had it been daytime, Ren Isana might have been counter-killed. The moment Apollo unsealed himself, all negative status effects would have vanished instantly, leaving Ren Isana without a single opening.
Thinking of this, Ren Isana felt relieved. Besides [Incarnation of the Sun], he had also gained a "Sure-Hit" Authority: no matter what attack he unleashed, it would always strike the opponent.
Then there was that massive Divine Power. The Sun's divinity had completely fused with his own strength. Now, Ren Isana was the natural bane of all dark creatures.
On top of that, he gained a "God-Slaying Special Attack" trait. Because he acquired this Authority through illegal means, Divine Power would have a minimal effect on him in the future, and his magic resistance was maxed out.
Sensing his condition, Ren Isana's face was covered in smiles. Authority, special attacks, immortality—he had maxed it all out. It was a massive harvest.
"So strong. And Apollo's body is almost fully dissipated," Ren Isana noted, sensing the Apollo in the coffin. Only a tiny bit remained; by his calculations, it would only take another two or three days.
Once fully absorbed, Ren Isana's strength could push even further. Based on his current Excelia bar, he would probably be halfway through Tier 7—around 50%?
With that thought, Ren Isana closed his eyes to study the power within him. Time passed, and three days went by in a flash. The Magic Circle beneath him dimmed, signaling Ren Isana's successful transition into a God Slayer.
As the last of the power sank into his body, Ren Isana's work here was officially done. Feeling the strength within him, he was extremely satisfied.
Unsurprisingly, his Excelia bar had reached 50%. With pure Divine Power, a powerful physical body, and the power of a God Slayer, the feeling was simply incredible.
"It's finally over. If it took any longer, I would've started hitting someone." Just as Ren Isana was savoring the moment, Natsuki's figure appeared out of thin air. She looked at him, a strange glint in her eyes.
This guy was truly ridiculous—he had perfectly seized everything Apollo had. This was no small feat. She was curious to see how far Ren Isana would grow in the future.
"Thanks for the help, Natsuki. Next, we're heading to a different world, right?" Ren Isana felt his current strength, his heart full of anticipation.
"No rush. Those guys haven't returned yet. You'll spend some time learning [Spatial Magic] from me. Now, you should be able to learn all my other spatial spells." Natsuki's eyes flickered; she decided to teach him every spatial spell she knew.
Besides hers, he also needed to learn Yor Forger's techniques. As she spoke, a Magic Circle appeared under Natsuki's feet, preparing to teleport Ren Isana away.
However, just as she was about to activate the teleportation, an accident occurred. The Magic Circle she released exploded!!
Watching the Magic Circle instantly dissipate, Natsuki was stunned for a moment. Then, realization dawned. "I almost forgot. Your magic resistance is maxed out. Get back to the dormitory on your own. I'll message you this afternoon."
After saying that, she didn't bother with him anymore and used her own magic to vanish. The moment Ren Isana became a God Slayer, his magic resistance had reached its limit.
If she wanted to teleport Ren Isana, he would have to completely lower his guard. But that was impossible because this was a God Slayer's passive trait; magic resistance and defense were both maxed out.
Whether it was magic or some curse, nothing would have much effect on him. She knew very well how absurd a God Slayer's constitution was—and Ren Isana was a perfect one.
An extraordinary combat constitution meant that when facing someone with divinity, he would instinctively explode with even more terrifying power, keeping himself at his absolute peak. In a crisis, he could even push past his limits.
Then there was the terrifying "Mystery Resistance." Whether it was curses, magic, or anything energy-related, a God Slayer had extreme resistance.
Things like [Spatial Lockdown] or [Spatial Teleportation] could be directly ignored. It was essentially like having permanent [Super Armor] with infinite duration.
These were just the many passive abilities of a God Slayer. There was no telling just how ridiculous Ren Isana could become. In any case, he would be far more terrifying than the current God Slayers.
After Natsuki left, Ren Isana activated [Spatial Teleportation] and returned to his dormitory. The dorm was currently empty; the others hadn't returned yet.
Back at the dorm, Ren Isana immediately went to take a proper bath. Only after finishing did he charge his phone. As soon as it turned on, a flood of messages arrived.
Most were from Asuna, though they were only from the first two days after they separated. The later ones were from Maya or Emilia and the others.
Asuna had lost her signal entirely after entering the Dungeon, so she stopped sending them. Emilia hadn't been able to find Ren Isana and seemed to have asked Natsuki, who must have explained the situation.
After reading the messages, Ren Isana began replying to them one by one. He replied to everyone except Asuna, since she was still inside the Dungeon.
Shortly after sending his replies, Ren Isana received a text from Natsuki telling him to come to the teaching building. She and Yor Forger were already waiting. Seeing the message, Ren Isana hurried out.
Once he arrived, Natsuki spoke directly: "Follow me. Today, you must learn everything Yor Forger and I have to teach. Then, you'll go bring those guys back!"
With that, Natsuki swung into action. She demonstrated every spatial technique she possessed, including several [Spatial Magic] methods Ren Isana had never heard of.
Everything she showed, Ren Isana copied. He mastered them all with ease. This time, he didn't hold back at all.
Seeing Ren Isana's performance, Natsuki spoke with a hint of frustration, "Your talent has evolved along with your strength. Go learn Yor Forger's techniques too!"
With so many tools at his disposal, plus that terrifying God Slayer constitution and his Authorities, Ren Isana's true combat power was likely far beyond his Tier 7 status.
Man, it seemed she, as a teacher, had nothing left to teach him. If she wanted him to keep growing, the only option was to throw him into another world.
Only by learning the methods of different worlds could Ren Isana truly reach his full potential. However, there was one problem: could the others keep up with his pace?
Ren Isana had basically ascended to heaven in a single step. Could his classmates keep up with his rhythm when the time came? Thinking of this, Natsuki decided to turn up the pressure on the rest of them.
If they couldn't keep up, they would slowly be weeded out. You can't participate in what Ren Isana is doing? Then you can't join. You want to join? Then raise your strength.
Just like this time—to participate in the new world, those students had all started grinding like crazy. But for Natsuki, it wasn't enough. Nowhere near enough!
Ren Isana was already Tier 7, while those students were only Tier 5. Although that far exceeded expectations compared to others, their potential hadn't been completely squeezed out yet!
Even if you can't compare to Ren Isana, you're in the same class; you can't be too pathetic! Tier 5 is not the end!
Ren Isana didn't know what Natsuki was thinking. He was currently focused on learning all of Yor Forger's moves. Yor Forger began teaching him various high-level assassination techniques and God-slaying strikes.
While learning, Ren Isana asked curiously, "Yor-sensei, why haven't you become a God Slayer when you have such God-slaying techniques?"
This was Ren Isana's biggest confusion. Yor Forger must have taken many divine lives, right? Otherwise, where did the [God-Slaying Blade] come from? Yet, she wasn't a God Slayer.
"Because I didn't undergo the transition. To become a God Slayer, you have to slay a Heretic God in that specific world. I've slain gods in other worlds; they even cursed me, but those curses were all broken," Yor Forger explained with a smile.
Hearing this, Ren Isana raised an eyebrow. Heretic Gods? So it really was that world? Ren Isana understood instantly. It wasn't that she couldn't, but that she didn't want to.
"Becoming a God Slayer over there comes with restrictions. You should be able to feel your own situation, right? You can use your Authorities whenever you want, but other God Slayers can't. They have many restrictions and incredibly long cooldowns," Natsuki explained slowly.
Ren Isana nodded. He indeed felt like he could use his Authorities at will. They felt like they belonged to him completely; he could use them with a clap of his hands, or even without one.
"That's the fundamental difference. Other God Slayers carry a god's curse. While it's true they gain Authorities, their strength becomes fixed. To improve, they have to keep slaying gods... but even then, the effects are limited." Natsuki sounded regretful as she mentioned this.
If it weren't for that, those individuals might have been even stronger. But the moment they transitioned into God Slayers, their strength was set in stone. The only thing they could increase was their number of Authorities.
"So because I don't have the curse, I can keep getting stronger? And because I'm a God Slayer now, any divine curse is useless against me..." Since he had no curse, becoming a God Slayer granted him absolute resistance, and because of that resistance, he couldn't be cursed again!
This must be why they called him a perfect God Slayer. He really had to thank Apollo for the generous gift package!
"Exactly. One can only say your luck is incredibly good. It's a pity the gods of that world have become wary," Natsuki said with full regret.
Hearing her, she seemed to have considered doing the same? Ren Isana was speechless. At the side, Yor Forger added with a smile, "It's because of the flaws that I didn't become a God Slayer. Although slaying a god results in a curse, we can already break those curses here."
Ren Isana nodded, finally understanding. He didn't dwell on the issue and continued learning from Yor Forger, absorbing all her skills.
Yor Forger taught him everything without reservation, even instructing him on what to watch out for when fighting gods and how to kill them quickly.
As he learned, Ren Isana's eyelids twitched. How many gods had Yor Forger killed to be this proficient? This was a real eye-opener. "You're the real God Butcher here, aren't you?"
Ren Isana spent the entire day learning from the two of them. It wasn't until evening that he had completely milked them of their techniques. Only when they had nothing left to teach did he stop.
"If you're interested in other magic, you can go to Director Ken. He's recovered now; you can have him teach you everything he knows," Natsuki glanced at the sky and made the suggestion.
Ren Isana shook his head. "As for magic, there's no need. I learned many spells in Emilia's world, and Beatrice has a contract with me now."
The one thing Ren Isana didn't lack was magic. What he lacked were martial techniques, but today Yor Forger had filled that gap. From today on, Ren Isana had truly come into his own.
On a global scale, he was likely a major figure now. With inexhaustible Magic Power and mastery over countless techniques, his strength couldn't be measured by common logic!
Natsuki didn't push further. She instructed him, "As long as you know what you're doing. Go bring those guys back tomorrow. See how many have broken through. You'll take the Tier 5 students to the new world!"
Negotiations for the new world were finished. No one above Tier 8 could go, but those below were allowed. Ren Isana was the perfect fit. This was exactly the outcome they had hoped for.
The basic situation of that world had been roughly figured out. She would explain it to Ren Isana when he departed. This summer, Ren Isana and the others could forget about a vacation; they were going to explore another world!