Souta hadn't been thinking about turning Nezuko into a Saint Seiya or anything through Athena.
Instead, his mind had gone to the world of Campione.
Sun-based power... Campione universe... Combining the two, Souta came up with a bold plan: Have Nezuko slay the God of War, Verethragna, and steal his Authority of the "White Stallion."
The "White Stallion" can wield solar power to rain the sun's wrath upon great sinners: a re-creation of solar flares as blazing bombardments.
Of course, it's not on par with real solar flares.
If it were, one attack would be enough to end Earth.
But even as a toned-down version, it was said in the original story to be powerful enough to incinerate half of Japan's Kanto region.
In Campione's finale, one blast even destroyed the goddess of fate's divine realm.
With firepower like that, Muzan Kibutsuji wouldn't stand a chance.
In fact, one hit would definitely kill him.
"The tricky part," Souta mused, "is making sure Nezuko actually acquires the White Stallion Authority—Campione powers aren't doled out at random. They're based on personality and context."
"But Nezuko's a demon who evolved to withstand sunlight. That might mean she has a natural affinity for sun-based powers. Maybe she'd take White Stallion instinctively?"
"No... Can't rely on luck. I'll have to use divine power to raise the odds."
The more he thought about it, the more feasible the idea seemed.
Drawing strength from another world would also save him tons of divine energy.
And if Nezuko stole just the White Stallion, rather than all ten of Verethragna's Authorities, it might be more adaptable—less like a massive ult and more like a flexible tool.
Like the Marquis's "Authorities of wind, rain and thunder"—its scale could be freely controlled. It could level a port city or just rustle a single leaf, depending on the user's control.
Of course, that demanded immense skill.
Altair: "@Souta. You've thought of something?"
Shiroyasha: "Hey hey, we're curious too. Spill it already, kid!"
Nezuko: "God-sama, do you have a plan?"
As Souta pondered, the group was getting antsy.
He had teased a big reveal, then gone silent—talk about suspense.
Souta: "Calm down, this one isn't some crazy brainstorm. It's a legitimate plan—using another world's power to get stronger."
Souta: "Remember the 'Campione' world I mentioned?"
Athena: "That's my world. What about it?"
Souta: "@Athena. Your world has Campiones, right? Humans who can slay Heretic Gods and steal their Authorities. Nezuko could gain a powerful attack method that way."
Athena: "Hmm? You plan to train her to be my enemy?"
Souta: "Ahem, technically yes. But she'll go back to her own world eventually, so it's not like you'll cross paths. And come on—if we're talking about your enemies, isn't there already one in the group?"
Athena: "You don't need to convince me. I don't mind if she gets stronger this way."
Athena: "Just be aware—killing a being on my level is no small task."
Shiroyasha: "Is it really that hard?"
Shinobu: "I don't think so."
Shiroyasha: "Could you kill one with a single slap?"
Shinobu: "Haven't tried, but I probably could. You?"
Shiroyasha: "Pfft, easy. I could blow one away with a breath."
Athena: "You dare mock me? You've provoked me!"
Shiroyasha: "Oh? Want a duel? I'll set the stage. But the loser has to do what the winner says~ Hehehe."
Shiroyasha: "Don't worry, I've got simple tastes. Just wear a few cute outfits for me and pose for some photos. Fair deal, right?"
Athena: "You sound awfully confident. Arrogant, even!"
Shiroyasha: "I am arrogant. So? Gonna come humble me? I'm waiting in Little Garden anytime."
Shiroyasha: "Unless... you're scared? I've seen plenty of cowards before."
Kurumi: "That's too much, Shiroyasha. Don't pick on the newbie like that."
Altair: "Yeah, that's crossing the line."
Rin Tohsaka: "Seriously! That's classic baiting!"
Athena: "Picking on a newbie? Wait... this Shiroyasha—is she that strong?"
Souta: "@Athena. Don't be fooled. Shiroyasha is the strongest member of our friend group. If she wanted to, she could wipe out your entire world."
Kurumi: "Destroying planets is one thing. I think she can create them too. She has multiple game fields on a planetary scale."
Souta: "Actually, I think they're star-sized. Remember the sun that moves horizontally inside one of them?"
Shiroyasha: "Hey hey hey! Stop spilling my secrets, you jerks!"
Shiroyasha: "@Athena. Don't listen to them, rookie. Sure, I used to be strong, but right now? I'm super weak! Barely one ten-thousandth of my former self! You totally have a shot at beating me. Really!"
Meanwhile, in Naples of the Campione world...
Athena stared at her phone, stunned.
Souta doesn't lie needlessly... so that means such power really exists?
Planetary destruction... even for a god, that was terrifying.
She glanced at Shiroyasha's username and etched the name into memory.
A flicker of displeasure flashed in her eyes as she muttered:
"No pride as a strong one... shameless."
She quickly set aside the banter and messaged Souta again.
Athena: "@Souta. You wouldn't suggest this if you didn't have a way to let her kill a god. So, who's the target? Gods don't just show up randomly."
Souta: "Didn't I say I know the story? In your world, soon there'll be two Heretic Gods who show up: God of War, Verethragna and King of the Gods, Melqart."