Multiverse: Becoming a Giant of Light, Godslayer from the Start

The power of eternal youth and undying life was impressive, certainly. But for Su Mo at this point, something else mattered more.

—The sheer amount of magical energy. He took a moment to closely inspect the flow of mana within himself. Campione Su Mo soon furrowed his brow in confusion.

"Wait a minute… What happened to the 'perpetual motion machine' thing? Why do I only feel like my mana reserves have doubled?"

To be fair, doubling the mana capacity of a god-slayer-level existence was still a monumental leap. But considering how much he had pinned his hopes on Heaven's Feel, it felt underwhelming. He had expected to skyrocket in power instantly upon acquiring it. Seeing his discontent, the Type-Moon Su Mo rolled his eyes.

"If gaining the Third Magic instantly granted you infinite mana, then the original wielder of Heaven's Feel wouldn't have died, would he?"

If one had truly limitless mana combined with eternal life, wouldn't they have ruled the world long ago? Yet the original magician didn't manage such a feat. That alone spoke volumes about the limitations of the Third Magic.

Not to mention, many beings in the Type-Moon world had touched upon fragments of the Third Magic. Yet none displayed invincibility. "Still, the perpetual motion thing isn't exactly wrong either," Type-Moon Su Mo patiently explained.

"The essence of the Third Magic is the materialization of the soul—it replaces the decaying flesh with an eternal spiritual body. And in the Type-Moon world, magic circuits are part of the soul. Once the soul is fully materialized, your entire body effectively becomes one giant magic circuit."

"In other words, your body generates mana continuously. It's like a living perpetual engine." So, while infinite mana was a side effect of this process, it came with caveats.

"But like any perpetual motion device, there's still a limit to its output," he added with a shrug. "I've only performed the most basic soul materialization on myself so far. That's why the mana capacity only doubled."

"However, the speed at which I regenerate mana has increased dramatically. In general, we won't have to worry about running out of mana ever again." To put it simply, with Su Mo's current grasp of Heaven's Feel, he couldn't yet achieve endless mana. But even with this limited understanding, he had doubled his internal reserves and dramatically boosted regeneration speed. Even if he were to completely drain all his mana in an instant, it would replenish rapidly—almost effortlessly.

"I see." The god-slayer Su Mo nodded thoughtfully after hearing the explanation. "That faster regeneration… that's a very practical ability." It meant he could spam ultimate abilities like basic attacks.

"And you mentioned that this was only from your preliminary application of soul materialization…" he added, his eyes gleaming with interest. "That means, once you fully master the Third Magic, our mana reserves will increase even further?" He was quick to grasp the point.

The Type-Moon Su Mo smirked in satisfaction. "Of course. Who do you think I am?"

"Remember, Heaven's Feel isn't a divine authority—it's a system of magical knowledge. The more I research and refine it, the more powerful it becomes. Right now, I've only scratched the surface. But once I master it fully…"

"Limitless mana will be nothing more than a plaything in my hands!"

While his words carried a clear note of self-congratulation, they weren't wrong. The Third Magic did have the potential to achieve near-limitless mana. The only requirement was enough study and refinement. Even with a direct connection to the Root, he had to transform that knowledge into something truly his before it could manifest real power.

Hearing this, both the god-slayer Su Mo and the pirate Su Mo exchanged glances—and immediately burst into applause.

"Well said! As expected of me!"

"We'll leave the infinite mana to the big boss!"

If you're going to ride someone's coattails, you'd better do it properly. And that meant hyping up the boss when he's showing off. After all, they stood to benefit the most. Thanks to the Type-Moon Su Mo's current progress, their mana pools had already doubled. Their regeneration had become absurdly fast. And on top of it all—they now possessed eternal life.

This kind of gain was something virtually impossible to achieve in their own world. Naturally, when faced with a powerhouse like this, the only correct response was to flatter him.

"Well said, well said!"

The Type-Moon Su Mo accepted the praise from the other two with a modest expression, though the slight upturn at the corner of his mouth revealed just how pleased he really was.

Unlike the Type-Moon world, this misty space was entirely his own domain. Here, he couldn't help but loosen up and let his more ridiculous side show. Perhaps this was the true nature of all Su Mos—a touch of silliness wrapped around a core of power.

Once the compliments and laughter settled, Campione Su Mo suddenly noticed a flash of new information appearing in his mind. "A divine summoning ritual… Huh? You already completed it?!"

He was visibly shocked. The Holy Grail War had only lasted a few days so far. It was impressive enough that Su Mo had managed to obtain the Third Magic in such a short time. He had assumed that collecting some information on Heroic Spirit summoning was the most that could've been achieved.

But now, the Type-Moon version of himself had not only gathered data, but he had also fully developed a completed divine summoning ritual.

"Yeah, I was a bit surprised too," Type-Moon Su Mo nodded. "But it's true—I've got it ready." In truth, he hadn't expected to succeed either. Who would've thought his daughter would suddenly return during this critical time and present him with exactly what he needed?

Illyasviel really was an amazing daughter! He made a mental note to praise her properly later. She'd probably have to return to the future soon anyway.

"Boss-tier power!" Campione Su Mo complimented with no hesitation. He didn't know exactly how his counterpart pulled it off, but this was exactly what he needed. With this ritual, his god-slaying efficiency would soar. More importantly, it would allow him to summon specific deities.

There were several divine authorities he'd had his eyes on for quite a while. This was the breakthrough he needed. Seeing how excited he was, Type-Moon Su Mo added a word of caution.

"Just don't get your hopes too high. The success rate of this summoning array is only around thirty percent."

"Plus, there's always a chance the god won't respond to the summoning."

"And let's not forget—it still needs a catalyst, something like a holy relic."

"It's not as simple as you're imagining."

After all, summoning a divine being wasn't trivial. Even with top-secret knowledge from the Clock Tower, it couldn't be made foolproof. The actual success rate was quite low, and the requirements were fairly strict. Just like summoning Heroic Spirits, summoning a god required a suitable relic—and for gods, that meant a divine artifact. And divine artifacts weren't exactly common. Even in the god-slayer world, they were rare.

Hearing all this, the god-slayer Su Mo still nodded eagerly. "I get it, I get it! But honestly, a thirty percent success rate is already amazing!" In his world, similar rituals barely had a one-percent chance of success—and they even required a shrine maiden as a sacrifice.

"As for catalysts, I have a bold idea."

Though divine artifacts were rare in his world—barely reaching double digits, and most being leftovers from minor deities—he believed he had something even better than a divine relic.

"In the god-slayer world, there's something far more tempting than any divine artifact."

"I believe that if we offer this as a catalyst, those heretic gods absolutely won't resist."

"They'll descend immediately, eager for battle!" With visible confidence, he made his declaration.

Hearing this, Type-Moon Su Mo gave him a skeptical look. "There's something that guaranteed to lure down gods?" He couldn't think of anything off the top of his head. Not every deity had mortal attachments or unresolved bonds like Athena and her obsession with regaining full strength.

But if there were one thing in the god-slayer world that truly mattered to the gods…

"…Don't tell me—" Type-Moon Su Mo's eyes widened in realization. The marine Su Mo caught on as well.

"You're not thinking of using… a god-slayer as the catalyst to summon a god, are you?!"

Campione Su Mo blinked, surprised they had guessed so quickly, then laughed it off. "Tch, I can't believe you figured it out already."

"But of course, I'm brilliant. So naturally, so are you!" He managed to praise both them and himself in a single breath.

"Using a god-slayer who's previously defeated a deity to bait a god… That's downright dirty!"

Type-Moon Su Mo couldn't help but comment, though his eyes gleamed with excitement. The plan sounded a bit wild, but the theory held water. As long as the ritual reached the gods, the ones who had lost to that very god-slayer would be sorely tempted to descend for a rematch.

And once they did—bam! Another power added to Su Mo's collection.

This strategy wasn't just clever—it was brilliant. Not only did it have a higher success rate, but it could also be used multiple times. Every divine authority a god-slayer carried represented a divine encounter, which could serve as a summoning link.

Old veterans like Marquis Voban and Luo Hao had an abundance of divine authorities. Tying them up and using them as summoning bait could call down dozens of gods. And more importantly, Su Mo could finally get his hands on the authorities he'd been coveting from other god-slayers. From every angle, this plan was perfectly viable.