Demon King After the End-Chapter 34: Construction Begin [2]

The Chamber Plan – Leon’s Briefing

Leon held up the full system blueprint for the chamber—one he’d purchased from the System Shop the previous night at an obscene cost. The plan included:

A layered chamber divided into three magical basins.

Mana-infused stones for filtering solid waste.

Purification runes to remove toxins, bacteria, and mana rot.

A final clarification pool where the water could be rerouted to fields or storage.

And just in case, a manual fail-safe: a lava pit valve that could be opened to destroy everything if things went... well, very wrong.

"This chamber will clean everything that goes through it," Leon explained. "If we get it wrong, the smell alone could kill morale—and possibly actual people."

Sylviana raised a hand. "So basically, a glorified toilet bowl with magical sparkles."

"Pretty much, yes."

Gorran arrived carrying a massive metal ring over his shoulder. "Where do you want this lid?"

Leon pointed. "That’s for the top seal. After the dome is built."

He nodded. "Right. I’ve got ten guys hauling stone and another five shaping the pit walls. We’ll reinforce it with mana bricks. Ugly, but it won’t collapse if someone sneezes on it."

One of the ogres in the back tripped and dropped a stone slab into the pit with a thunderous thud.

"...Assuming no one dies first."

Zorath arrived with his usual slow, imposing steps, followed by the same two dark elf apprentices.

He looked at the structure and gave a thoughtful rumble. "This will take time."

Leon nodded. "Take it. The runes need to be perfect. Even if the pipes clog or Kaedor falls in, this has to work."

Zorath walked to the purification zone and began slowly carving intricate runes into the central basin. They glowed faintly with each completed symbol. 𝒻𝓇𝑒𝘦𝘸𝑒𝒷𝓃ℴ𝑣𝘦𝑙.𝒸ℴ𝘮

"Containment... Filtration... Cleansing..."

The dark elves whispered feverishly, trying to copy the symbols. One of them tripped over his own feet and fell face-first into the dirt.

Zorath didn’t even blink.

Meanwhile, Mora flitted around the chamber perimeter, trailing glowing green spores that settled on the stone.

"These babies will eat any stinky stuff that gets left behind," she chirped, spinning midair. "And the roots can help break down sludge!"

"You’re... giving the poop a plant buffet?" Leon asked.

Mora gave a proud twirl. "Nature recycles everything!"

She made a crown of fungus and plopped it on Leon’s head. "Now you’re the King of Sanitation!"

Leon sighed and wore it anyway.

Elvera walked along the site with a checklist. She was like a force of nature with a clipboard.

"Trenches connected?"

"Check."

"Mana pipes stable?"

"Check."

"Goblin caught pooping in the test chamber?"

"...What?"

She spun around to see a goblin being dragged out by two ogres.

"I thought it was open for business!"

"It’s not!"

She rubbed her forehead. "I need stronger signs..."

Sylviana, arms crossed, leaned beside the chamber entrance and casually threatened anyone slacking off.

"You," she pointed at a gnoll sniffing mushrooms, "touch one more plant, and Mora will use you as compost."

The gnoll whined.

She turned to Leon. "I have to admit. As ridiculous as this sounds... it might actually work."

He smirked. "Coming from you, that’s high praise."

"Don’t let it go to your head. It’s still a glorified outhouse."

End of Day – Progress Update

By sundown, the foundation was complete. The basin was fully dug and lined, the initial enchantments set, and the mana pipes laid down.

Zorath continued carving well into the night.

Gorran’s crew began building the outer dome.

Kaedor worked out the waste flow directions using mana markers.

Elvera prepared to test the water flow tomorrow.

And Leon?

He watched it all from the top of the newly-built chamber entrance, arms crossed again. Not because he was trying to look cool—he was just too tired to move.

"Tomorrow," he muttered. "We turn on the tap."

The Next Day

The morning air was thick with anticipation. Not battle, not drama—just the possibility of poop exploding in magical fountains.

It was the day the purification system would be tested for the first time.

Leon stood at the center of the newly completed structure, surrounded by his retainers and a crowd of curious demons, goblins, dark elves, and even a few cautious ogres.

Sylviana pinched her nose theatrically. "If this backfires, I’m blaming the goblins."

One of the goblins nearby raised a hand. "Pre-blamed. Got it."

Leon crossed his arms as Elvera jogged over with her clipboard.

"All pressure valves are in place. Mana conduits are stable. Goblin-proofing is about 70%," she said.

"Wait, only 70%?" Leon asked.

Elvera looked tired. "There are goblins. It’s impossible to go higher than that."

Kaedor chimed in from beside a side tunnel. "The digging lines held. Pipes are angled right. Waste should flow straight in once the gate opens. If it backs up, we’ll know."

"Because of the screaming?" Leon asked.

"Yup."

"Alright," Leon said, raising his hand. "Open the intake gate."

A loud metal clank echoed as the hatch creaked open. Somewhere in the distance, a pipe gurgled ominously.

The crowd watched with morbid fascination.

At first, nothing.

Then... the unmistakable sound of sludge rushing through a stone pipe echoed through the chamber. Several people took a step back.

Dark fluid shot out of the intake pipe and flowed into the first basin. The glowing stones shimmered, and the sludge immediately slowed, thickening as impurities began being filtered out.

The water entered the second basin, slightly clearer now. Runes on the walls pulsed.

Then into the third basin—and out of the outflow channel came...

Clear. Sparkling. Water.

The silence that followed was deafening.

A goblin leaned over to sip it. Everyone screamed.

Leon yanked him back by the ear. "Test samples first, you idiot!"

Mora zipped up with a small vial and scooped water into it. She sniffed it, then dipped her hand in and let a few spores fall into it.

The spores glowed... then pulsed green.

"It’s clean," she said. "Like, really clean. The plants approve."

Zorath rumbled low. "The runes are stable. Water is purified at every step. Containment seals held."

Gorran crossed his arms, looking impressed. "Huh. I thought it’d explode. Not bad."

Sylviana blinked. "It... actually worked."

Kaedor squatted beside the pipe. "Neat. Now we just have to make sure nobody shoves a goblin into it."

The goblin who almost drank it muttered, "One time..."

Elvera scratched something off her checklist. "We’ll set up guards. And signage."

Leon nodded. "No one’s to dump corpses, potions, or magical junk into it. This is for waste and water only."

Sylviana leaned closer and whispered, "You just made sewage exciting. That’s a skill."