After finishing breakfast in the dining hall, Tsuna returned to his room and began sketching out ideas for a new Training Space.
Unlike the relaxed atmosphere of the living quarters, this one would be dedicated purely to physical conditioning.
"I'll need a combat zone too—somewhere Finn and the others can fight monsters that exploit their weaknesses. The entire place has to be extremely durable… ideally with a self-repairing feature."
A training field that kept breaking down after every battle would be a pain to maintain.
What Tsuna wanted was a space that could take a beating and rebuild itself automatically. Otherwise, he'd have to waste time fixing it every few days instead of focusing on the important stuff.
As for the environment…
The image of the Large Tree Labyrinth came to mind.
That floor was infamous for its harsh, oppressive terrain. Even so, its conditions were somewhat restrained compared to what it could be.
So what if he recreated that environment inside the Training Space?
Fighting monsters that targeted your specific weaknesses while surrounded by extreme natural conditions—it'd skyrocket the difficulty in one go.
Still, the Large Tree Labyrinth's ecosystem was about as brutal as it got.
Tsuna nodded to himself. "Yeah, that's perfect for the combat zone."
Next came the other part.
"I'll also need a space for daily training."
"The basic training zone doesn't need much—just a separate area where people can eat and rest. Hmm… separate living quarters for men and women, of course."
"And the main thing is that the environment itself has to put constant pressure on the body."
Stats could only increase once someone hit their limits—that was the foundation of growth. Tsuna had already figured out how to make that happen.
Gravity was one of the best ways to push the body beyond its comfort zone. A high-gravity field would force muscles to work harder with every movement.
Even a simple one-times gravity increase, if maintained for long periods, would gradually wear down the body and force adaptation.
"Besides gravity, I'll need extreme environmental factors to push their endurance further."
Suddenly, a pristine white temple appeared in his mind's eye.
"The Room of Spirit and Time… now that's a great idea."
The legendary training chamber from Dragon Ball—one year inside equals a single day outside. Though, it came with a strict two-day entry limit. Stay longer, and the door would close forever, isolating you in a pocket dimension.
"Still, I shouldn't add time acceleration just yet."
"An environment that harsh would already put tremendous mental strain on anyone who stayed inside too long."
"And if I set the gravity too high from the start, normal people wouldn't last even an hour."
"If the body can't withstand the pressure, it could easily lead to unnecessary deaths."
Considering how much free time they had lately, and the mental toll that blank white space could cause, there was no real need to mess with time flow for now. Extreme gravity settings would also need fine-tuning.
The environment, though—that could be brutal. After all, physical suffering was part of reaching one's limits.
But mental collapse? That was where he drew the line.
Each session would probably last at least half a day, with a full-day cooldown period between uses.
Tsuna wasn't about to treat them like Saiyans—those monsters could just think themselves stronger. Humans didn't get that luxury.
"Alright, that should do it."
Two large white doors slowly materialized before him.
"Next step is just setting these up in a fixed room."
"Oh, right. I'll also need to add identity-based access."
If someone stumbled into this space by accident, it'd be a disaster—especially if they weren't part of the Loki Familia.
With that thought, Tsuna waved his hand, erasing the unfinished doors.
Defective products had to be scrapped immediately. No need to expose unnecessary details about his abilities.
"I'll need some of Miss Loki's blood as the identification marker."
Different Familias had different divine bloodlines, and each god's essence was unique. The divine blood that carried their Falna served as a perfect identifier.
With that decided, Tsuna left his room and walked toward Loki's quarters.
Pop pop pop!
He knocked, but the door was opened by someone else—Astraea.
"Goddess Astraea."
"Oh, it's you."
Seeing the boy who had rescued her children, Astraea blinked in mild surprise before her expression softened into a warm smile.
"I never got the chance to thank you properly," she said. "You saved my girls from real danger. I'm truly grateful."
Tsuna returned her gratitude with a polite nod.
"Goddess Astraea, it was nothing. I only acted because I happened to hear your voice that night."
"If not for that, I never would've gone into the deeper floors at all—let alone had the chance to bring them back."
And that was true. He might've been the one who did the rescuing, but the cost had fallen on Astraea herself.
She'd sacrificed her own independence to become Loki's subordinate deity, and her Familia had been absorbed into the Loki Familia.
In truth, once Astraea had done that, the Astraea Familia had effectively stepped off the stage of the Labyrinth City.
It hadn't been a small price to pay.
Stepping inside, Tsuna found Loki lounging about, curiosity flickering in her eyes.
"Tsuna, what brings you here this time?" she asked with a grin.
"It's about the Strengthening Plan," Tsuna said straight to the point.
"I've finished preparing the Training Spaces."
"One is for practical combat—where they'll face monsters designed around their weaknesses. The environment inside is modeled after the Large Tree Labyrinth."
"Like I mentioned before, I plan to recreate the black goblins and the Juggernaut we encountered during the last Expedition. Finn and the others will use them for real combat drills."
"The second is for daily physical training. It focuses on improving their Status—featuring extreme survival conditions, massive day-night temperature shifts, and adjustable gravity levels. It's meant to push the human body to its absolute limit and accelerate growth."
One for combat, one for daily grind—Tsuna had covered every base.
Loki's grin widened, her eyes sparkling with interest.
"Tsuna, take me and Astraea to see it later, alright?"
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You can read up to chapter 120 on patreon.com/NiaXD.