Just as Ren had said, Ophis was currently getting thoroughly beaten down.
Based on the strength of Lucemon and Ophis, their battle would undoubtedly shake the world.
So, when Lucemon said she wanted to spar with Ophis, Ren casually mentioned she could ask Azazel or Serafall—those two should have access to dimensional spaces suitable for training.
So Lucemon went straight to her acquaintance Serafall.
When she heard the two of them were about to arm wrestle, Serafall was so startled she nearly blew up the kitchen in the Sitri household.
After urgently contacting Sirzechs, Serafall opened up a dimensional space to let the two go wild.
Though she seriously doubted whether the space could withstand their duel.
Sure enough, under Serafall's nervous gaze, every punch exchanged between Ophis and Lucemon sent shockwaves through the alternate dimension, making it look like it could collapse at any moment.
"Is it really okay to just watch this, Nee-san? Isn't this space going to collapse?"
Seeing such a high-caliber battle, Sona's face turned pale, though having her sister nearby gave her a sense of safety—enough that she could still comment on how unstable this space seemed.
Serafall just gave a dry laugh.
"Sona-chan, do you really think I could stop a fight like this? Sirzechs-chan had his face smashed by Luce-chan's punch. Other than Rias and us, he hasn't seen anyone else these days, at least not until his face heals."
By the way, Lucemon's fists were infused with holy power, which is naturally a strong counter to devils, so Sirzechs's face couldn't even heal with his own power.
Serafall strongly suspected Lucemon had done it on purpose, just for laughs.
Sirzechs didn't seem to mind, as long as no one brought it up.
But then Rias, who didn't know anything, noticed the crookedness and asked about it.
Sirzechs brushed it off, but was silently waiting to fully recover before facing people again.
Luckily it wasn't her who got punched in the face. Otherwise, she'd be swollen up for days…
Of course, she had no idea it was Ren who'd spoiled the behavior of his pets.
Sona: "…"
I feel like I just heard something I wasn't supposed to.
---
In the alternate dimension, after warming up, Lucemon stretched her limbs.
Feeling the slow fusion of power within her, Lucemon nodded in satisfaction.
In truth, all the fighting she had been doing wasn't just from boredom or mischief.
Digimon, as a species, operate on a fundamentally different system compared to other worlds.
For instance, being made of pure data was already a massive distinguishing factor.
But when coming to the real world—or any other world—system incompatibility became a huge problem.
Especially after consuming a crystal of light-attribute, Lucemon realized the issue more clearly.
Thankfully, after ingesting those items, she found she could analyze the energies circulating in her body and convert her own power to match other systems.
Magic, spiritual power, light energy… she could decode and adapt her data-based powers into these systems, even achieving full physical embodiment.
After all, her current body existed through a data-based contract with Ren.
Now, Lucemon was constantly fighting to speed up this analysis process.
Of course, part of it was also her desire to stir things up.
A prideful Demon King who doesn't cause trouble isn't a real Demon King!
"You're way stronger than that Lucifer. No wonder my master likes you so much and went out of his way to bring you over. Yeah, you might be the strongest one I've met in this world."
Lucemon thought for a moment, eliminated Fou and Examon from the comparison, and nodded slightly.
She knew Examon—if they really fought, she wasn't confident she could win.
Among the Royal Knights, Examon was top-tier, and anyone at that level was already above her.
As for OmegaMon and that group of broken-tier Digimon, there was no point even comparing.
As for Fou, they hadn't fought, but there was a dangerous aura about her.
That's also why Lucemon didn't mind Fou calling her "Luce-chan."
Lucemon might be prideful, but she respected strength.
Besides, they were all part of Ren's group now—and for someone who made her stronger, Ren had earned a lot of her respect.
"Baka-red is stronger than me…"
"I heard he kicked you out, right? That's what humans call… taking over the nest."
"Yeah, but if I keep eating, I'll get stronger, and then I can beat Baka-red."
"By the way, didn't you eat something from Fou? Any changes?"
Lucemon's eyes sparkled—Ophis had eaten something from Fou, hadn't she?
She had always been curious. Ren gave each of them items that suited their powers.
Like her own crystal of light attribute, or Kuroka's bloodline crystal.
But Ophis was the first one to break that rule—though to be fair, Ren wasn't around when she teamed up with Examon to rob Fou.
Now, Lucemon was really curious—what happens when you consume something that doesn't match your nature?
Hearing the question, Ophis nodded slightly. The light mood vanished, replaced by a suffocating aura that even Lucemon felt.
"My power… has increased. And this power is—"
Lucemon widened her eyes, watching light-based power—her own energy type—rise from Ophis's body.
No longer was it just infinite power; now it was the holy light of angels.
"The Jealousy Crystal can actually boost the user's strength using someone else's power?"
Lucemon gritted her teeth slightly, clearly regretting not eating the thing herself.
But to her surprise, Ophis shook her head.
"It's not like that… The energy within the food reacted with my infinite power and gave rise to a completely new ability. This strength is derived from the concept of infinity."
As she spoke, Ophis extended her hand, and a massive hand of light formed, looming over Lucemon.
"A power that grows stronger with the strength of the enemy. Fueled endlessly by infinite power to push my body into overdrive."
It was similar to Fou's Principle of Comparison, but with a twist—Ophis's infinite power, combined with this principle, evolved into something else entirely.
Ophis knew full well—only she could use this ability so easily because she possessed the concept of infinity.
If anyone else tried—like a devil using holy energy—they'd purify themselves before anything even happened.
And she wouldn't use this casually, either. After all, it was still useless against Samael, the Dragon Eater.
Because before she possessed the concept of infinity, she was still a dragon.
Lucemon's eyes sparkled. She clasped her hands together, and a cosmic domain appeared.
"Grand Cross!"
BOOM——————————————————
The explosive sound shook everything, engulfing the entire alternate dimension.
"Thank goodness this kind of battle is happening inside a separate dimension… Otherwise, Kuoh Town would've been wiped off the map."
Serafall genuinely sighed in relief.
Though, if Lucemon had heard that, she probably would've said—
Your vision is too narrow. If I wanted to, my Grand Cross could purify the entire surface.
"You okay, Ophis…?"
Lucemon looked to the side and saw Ophis lying on the ground, silently raising a thumb.
Without a doubt, that was Lucemon's win.
"Um… Miss Lucemon, Ophis, are you two okay?!"
Suddenly, a respectful voice called out. Lucemon turned her gaze and saw Asia looking up at her in awe.
But as soon as Asia saw Ophis lying down, she panicked and ran over to help her up.
"Ophis, you can't just lie on the ground like that! You'll catch a cold!"
"I'm fine… I don't get sick."
"Still, that's not a good habit!"
Watching the flustered nun, Lucemon found herself liking the girl.
After learning she was an angel, the girl had immediately shown respect, which Lucemon appreciated.
If this world weren't so different from the Digital World, Lucemon would've already bestowed power on Asia and made her her angel. Who doesn't like obedient, well-behaved kids?
The only thing that annoyed her was Asia's stronger faith in the god her master had said was already dead.
"Asia, did Master send you?"
"Yes, Mr. Ren asked me to tell you he has something important to discuss, and that I should bring you back."
"Oh, it seems master has come up with something"
Lucemon's eyes lit up in excitement.