-0-
The next morning, Thanatos called a council meeting in the newly completed administrative building.
Rimuru sat at his right hand as Grand Regent. Touka stood behind him as commander of the Red Order. Various department heads occupied the other seats—construction, trade, agriculture, defense.
And at the far end of the table, the six ogres who'd survived their village's destruction.
"We have a problem," Thanatos began without preamble. "Spies. The human kingdoms have noticed our growth and are sending intelligence gatherers. Touka's Red Order has caught twenty-three in the past three weeks."
"What happened to them?" one of the trade representatives asked nervously.
"They were interrogated and disposed of," Touka said flatly. "None escaped."
"Which solves the immediate problem but not the underlying issue," Thanatos continued. "The Red Order is a military force designed for open combat and territorial control. We need a separate organization for counter-intelligence, assassination, and covert operations."
He looked at the ogres.
"Which is where you come in. The Red Order will remain our primary military force. But I'm creating a second order—the Black Order. Specialists in shadows, deception, and elimination of threats before they become visible problems. They'll operate independently but answer only to me and the Grand Regent."
The red-haired ogre prince leaned forward. "And you want us to lead this Black Order?"
"I want you to become it. You're skilled warriors, you understand tactics, and you have personal motivation to serve Thane well." Thanatos paused. "But you're still unnamed, which limits your potential. That changes today."
The ogres went very still.
Naming was power. Naming was transformation. And Thanatos had only named two beings so far—Touka and Geld—both of whom had become disaster-class entities.
"Last night," Thanatos said, "I consulted with Rimuru about appropriate names. He knows you better than I do, understands your personalities and potentials. So these names are his suggestions, but my gift."
He stood and walked around the table to stand before the red-haired prince.
"You. Step forward."
The prince did, dropping to one knee.
"I name you Benimaru. Rise as the first leader of the Black Order, and may your flames burn away all threats to Thane."
Power flooded from Thanatos into Benimaru. The transformation was immediate and violent. The ogre's body convulsed, his skin darkening slightly as death energy mixed with his natural fire affinity. Black kagune tentacles—four of them, Rinkaku type—erupted from his back, crackling with dark flames.
When Benimaru stood, his eyes had shifted to crimson, and the air around him distorted with heat and shadow.
[Evolution Complete: Benimaru - Death Ghoul (Flame Variant)]
[Threat Rank: Disaster-Class (Lower)]
Thanatos moved to the pink-haired princess next. "I name you Shuna. May your threads weave protection for all of Thane."
The transformation was gentler for her, but no less profound. Her body refined, her magicules stabilizing into something more controlled. A single Koukaku kagune formed at her shoulder—defensive type, crystalline and beautiful.
[Evolution Complete: Shuna - Death Ghoul (Fabrication Variant)]
[Threat Rank: Special A-Rank]
The old swordmaster was next. "I name you Hakurou. May your blade cut through all darkness."
The elder's transformation was subtle—his body didn't change much externally, but the aura he radiated became sharper, more dangerous. Two Bikaku kagune extended from his lower back, sword-shaped and impossibly sharp.
[Evolution Complete: Hakurou - Death Ghoul (Blade Variant)]
[Threat Rank: Disaster-Class (Lower)]
The purple-haired warrior. "I name you Shion. May your strength break all barriers."
Her transformation was the most physically dramatic. Her muscles refined, her frame growing slightly more imposing. Four massive Rinkaku tentacles, each one heavily armored, sprouted from her back.
[Evolution Complete: Shion - Death Ghoul (Berserker Variant)]
[Threat Rank: Disaster-Class (Lower)]
The two remaining warriors received names as well—Kurobe and Soei. Kurobe, the craftsman, gained death affinity for his forge work. Soei, the scout, evolved with shadow specialization that made him nearly invisible when he wished.
When all six stood transformed, the room's temperature had dropped noticeably. Death energy radiated from them collectively, making the human department heads visibly uncomfortable.
Thanatos looked at them with satisfaction.
"You've evolved into Death Ghouls—a variant I created specifically for Thane's forces. You possess shadow affinity, death magic, and kagune weapons. Train with these abilities. Master them. And in time, you may evolve further, as Touka has."
Benimaru dropped to one knee, and the others followed. "We pledge our lives to you, Lord Thanatos. The Black Order will be your shadow, eliminating threats before they can touch Thane."
"Good. Dismissed."
As the meeting ended and people filed out, Thanatos called up Benimaru's status to review.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━ INDIVIDUAL STATUS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Name: Benimaru Race: Death Ghoul (Flame Variant) Former Race: Ogre Threat Rank: Disaster-Class (Lower) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ PRIMARY SKILLS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ • Black Flame Manipulation → Death-infused fire magic • Shadow Step → Short-range teleportation through shadows • Rinkaku Kagune (4 tentacles) → Black flames coat each tentacle • Assassination Arts → Silent killing techniques ━━━━━━━━━━━━━━━━━━━━━━━━━━━━
The others showed similar growth patterns, each one specialized but all of them deadly.
Thanatos smiled.
Thane was growing stronger. The Red Order handled military operations. The Black Order would handle everything else. Rimuru managed the administration and diplomacy.
And Thanatos would continue pursuing power until nothing in this world could threaten what he was building.
The pieces were falling into place.
-0-
In a throne room hundreds of miles to the north, Demon Lord Clayman sat reviewing reports with mounting irritation.
The Harlequin Tear stood before him, her mismatched eyes carefully neutral as she delivered information that would have gotten lesser messengers killed.
"So let me understand this correctly," Clayman said, his puppet-like fingers drumming against the armrest. "In the span of three weeks, this 'Thanatos' has expanded his territory by sixty percent, established two military orders, signed treaties with both the Lizardmen Federation and representatives from the Dwarf Kingdom, and created a counter-intelligence force so effective that your spies can no longer penetrate his borders?"
"Correct, my lord." Tear's voice remained professionally detached. "The Black Order—his shadow force—has eliminated seventeen of our intelligence gatherers in the past week alone. They're led by a named ogre called Benimaru who evolved into something called a Death Ghoul. Disaster-class at minimum."
"Disaster-class subordinates." Clayman's smile was thin and didn't reach his eyes. "How many does he have now?"
"At least eight confirmed. Possibly more." Tear consulted her notes. "Touka, the Blood Orc general, is approaching Catastrophe-class based on her recent combat performance. The former Orc Lord Geld has been converted and integrated. The six named ogres are all Disaster-class. And those are just the ones we've managed to observe."
Clayman was quiet for a long moment.
This was problematic. A new power rising in the Jura Forest wouldn't normally concern him—the forest was politically worthless, strategically irrelevant, and populated entirely by monsters and wilderness.
But a power that could attract migration, establish infrastructure, and create Disaster-class subordinates in less than two months? That was different. That suggested potential for actual growth, actual threat.
"Tell me about his defenses," Clayman said.
"Diamond-core walls enclosing 160 square miles, created through some form of blood magic crystallization. The walls are enchanted, self-repairing, and strong enough to withstand sustained Disaster-class assault. Guard towers every quarter mile. Four main gates, all heavily defended. Internal organization is efficient—districts for different functions, proper roads, magical infrastructure."
"And his personal power level?"
"Unknown precisely. My Appraisal skill still can't measure him accurately, which suggests he's either using some form of concealment or genuinely operates at a level beyond standard classification." Tear paused. "However, witnesses report he created the wall expansion in under an hour. He named six ogres simultaneously without apparent strain. And he's constructed something in the western district that my scouts can't see but can sense—some kind of large structure with massive magicule concentration."
Clayman's fingers stopped drumming.
"An invisible structure with high magicule density. A research facility, perhaps?"
"Possible. The magicule signature suggests either advanced magic experimentation or some form of power amplification system." Tear looked up. "My lord, if I may—this Thanatos is dangerous. Not just to your interests, but potentially to the entire Demon Lord council. If he's allowed to continue growing unchecked—"
"He won't be." Clayman stood smoothly. "I think it's time we tested just how capable this new power actually is. If he can handle a proper threat, then he's worth approaching diplomatically. If he can't..." Clayman smiled. "Then the problem solves itself."
"What did you have in mind?"
"Charybdis." Clayman walked to a window overlooking his domain. "The sealed Calamity-class monster has been dormant for decades. It would be... unfortunate if it somehow escaped and happened to rampage toward the Jura Forest."
Tear's expression didn't change, but her posture shifted slightly. "Releasing Charybdis is extremely dangerous, my lord. It's a Calamity-class entity. If it isn't stopped—"
"Then it will devastate the Jura Forest and eliminate the Thanatos problem for us. And if Thanatos does stop it, then we'll know exactly how powerful he is and can plan accordingly." Clayman turned back to her. "Make the arrangements. Quietly. I want Charybdis freed within the week, and I want its path directed toward Thane."
"Yes, my lord."
"And Tear? Make sure there's no evidence connecting the release to us. As far as anyone knows, this was a natural disaster."
Tear bowed and departed.
Alone in his throne room, Clayman returned to his chair and steepled his fingers.
A Calamity-class monster versus a newly emerged Demon Lord candidate. Either outcome served his purposes. Either Thanatos died and ceased to be a concern, or Thanatos proved himself worthy of manipulation—in which case Clayman would have valuable intelligence on his capabilities.
Win-win.
-0-
In his invisible Magic Tower, Thanatos held in a sneeze, standing in the seventh-floor workshop, staring at a complex magical array he'd spent three days constructing.
At the center of the array floated a sphere of concentrated death energy—seventeen thousand monster souls, compressed and refined, pulsing with dark power. Around it, carefully positioned focusing crystals channeled energy from the leyline beneath the tower.
"Great Sage, analysis. Can this work?"
[Theoretical probability of success: 67.3%. The concept is sound—using compressed souls as a dungeon core and anchoring it to the Magic Tower structure. However, the integration between your Underworld dimension and a physical dungeon has never been attempted. Unpredictable variables exist.]
"But it's possible."
[Affirmative. If successful, the resulting dungeon would serve multiple purposes:1. Training ground for Thane's forces2. Magicule generation and collection3. Potential connection point to Underworld dimension4. Autonomous monster spawning system]
Thanatos circled the array slowly, examining each component. He'd studied the Death Dungeon extensively—the one that had formed accidentally after he destroyed the Orc army. Understanding how it had spawned monsters, how it had organized itself into levels, how the Dullahan had emerged as a boss entity.
This would be different. Controlled. Intentional.
"If I connect the dungeon to my Underworld throne, can I direct monster spawning?"
[Theoretically, yes. The throne functions as a focal point for death energy and soul processing. If successfully linked to a physical dungeon core, it could serve as a control mechanism for monster generation and evolution within the dungeon.]
"And the monster souls I've collected—they can't be used for my Demon Lord evolution, but they can fuel a dungeon?"
[Correct. The souls lack the evolutionary potential required for Master's personal advancement, but they contain sufficient death energy and magicules to power a dungeon core indefinitely.]
Thanatos made his decision.
He stepped into the array's center, placed both hands on the compressed soul sphere, and activated Death God.
The Underworld responded immediately. Reality twisted as the dimensional barrier between the physical world and his death dimension thinned. Thanatos pushed through it, pulling the soul sphere with him, feeling the resistance as he tried to bridge two separate spaces.
The Magic Tower shuddered. Leyline energy surged upward, drawn by the massive magical working occurring above it.
In the Underworld, Thanatos materialized before his throne with the soul sphere still clutched in his hands. The cracked ebony throne pulsed with power, the death energy streams flowing from every fracture.
"This might be insane," Thanatos muttered. "Great Sage, if this goes wrong—"
[The explosion will likely destroy the western quarter of Thane and create a Class-S death zone. Recommendation: Proceed with extreme caution.]
"Noted."
Thanatos pressed the soul sphere against the throne.
For a moment, nothing happened.
Then the throne began to absorb it.
The cracks in the throne's surface widened, the soul sphere dissolving and flowing into them like water into dry earth. Death energy erupted in waves, washing over Thanatos and the surrounding void. The streams flowing from the throne intensified, their number multiplying exponentially.
And in the physical world, the Magic Tower began to change.
The invisible structure became visible as death energy flooded through it, dark power crackling along every surface. The tower sank, half of it descending into the ground as the dungeon structure formed beneath it.
Floors appeared in rapid succession. Not the chaotic natural formation of the original Death Dungeon, but organized, intentional levels. Each one connected to the next through controlled passages. Each one designed for specific monster types and difficulty levels.
In the Underworld, Thanatos watched as new death energy streams began forming—not from creature deaths, but from the dungeon itself. The tower-dungeon had become an extension of his Underworld, a physical anchor point that would continuously generate monsters and collect magicules.
[Dungeon formation: 43% complete]
[Warning: Structural instability detected in floors 6-8]
[Compensating with additional death energy...]
[Dungeon formation: 67% complete]
The throne groaned, and for a terrifying moment Thanatos thought it might shatter. But the structure held, the cracks spreading but not breaking, each new fracture creating a new point of connection to the forming dungeon.
[Dungeon formation: 89% complete]
[Final integration phase beginning...]
The tower-dungeon locked into place with a sound like a bell tolling. The death energy settled, the chaotic surges becoming steady flows. The invisible cloak reasserted itself, hiding the structure from view once more.
[Dungeon creation: Complete]
[Designation: Tower of Thanatos - Death Dungeon (Controlled)]
[Levels: 10 floors (expandable)]
[Current monster capacity: 0/10,000]
[Underworld connection: Stable]
[Autonomous monster spawning: Initializing...]
Thanatos pulled himself back to the physical world, materializing in the seventh-floor workshop. The array had burned itself out, the focusing crystals cracked and dark.
But below him, he could feel it. Ten floors of dungeon space, empty for now but ready to spawn monsters based on the death energy patterns stored in his Underworld.
"Great Sage, what types of monsters will it generate?"
[Analysis of Underworld death patterns suggests the following monster types will spawn:- Floors 1-3: Skeletons and basic undead (training level)- Floors 4-6: Zombies and ghouls (intermediate)- Floors 7-9: Wraiths and death constructs (advanced)- Floor 10: Boss-class entity (currently undefined - will evolve based on accumulated death energy)]
[Additional note: Because this dungeon is directly connected to Master's Underworld throne, monster behavior can be influenced through direct command. Unlike the wild Death Dungeon, this is a controlled environment.]
Perfect.
Thanatos descended to the ground floor and exited the tower. From outside, it was still invisible—just empty ground to anyone who didn't know it was there. But his Universal Sense could map every floor, every passage, every chamber.
A training ground where his forces could grow stronger. A magicule generator to supplement the leyline. A testing environment for monster evolution. And potentially, if he was right, a way to study controlled undead creation that might eventually help him understand true soul generation.
"Begin spawning," Thanatos said. "Start with basic undead on floors one through three. Keep the deeper levels empty for now."
[Acknowledged. Spawning initialization beginning. Estimated time to full floor population: 6 hours.]
Thanatos turned and walked back toward the main section of Thane. He had a meeting with Rimuru scheduled to discuss trade agreements with the Dwarf Kingdom, and he needed to inform the Grand Regent about the new dungeon.
Behind him, in the invisible tower, the first skeleton pulled itself from the stone floor of Level 1, its bones clicking as it stood and began patrolling according to patterns written into its very essence by the Underworld throne.
The Tower of Thanatos had awakened.