Arc 31The Labyrinth’s Trial

Karigulio sent the Empire’s army into the Great Underground Labyrinth, where its guardians steadily destroyed the invading forces. As Xiao prepared to face the surviving hundred thousand soldiers alone, Mo Li chose to respect his decision, leaving the battle about to begin.

  • Karigulio committed 650,000 Imperial soldiers to the labyrinth, where traps and powerful monsters began decimating them.
  • Adaman, Yapitto, and Ze'Chion defeated Imperial forces on their respective floors, while Nine Demon Luo’s illusion beasts overwhelmed nearly one hundred thousand soldiers on the Eightieth Floor.
  • Xiao decided to face the Empire’s army alone to break through his martial arts barrier, and Veldora, Ramiris, and Azhdaha cleared the floors leading to him.
  • Mo Li discovered Xiao’s plan and learned that Xiao had no Resurrection Bracelet, but stopped Azhdaha from retrieving him and chose to respect his decision.
  • Xiao waited on the Ninetieth Floor as the Imperial army assembled, and Mo Li resolved to advance him after the war.
  • The Imperial commander mistook Xiao for Rimuru, but Xiao identified himself as the Guardian Yaksha beneath the Geo Archon.
Chapters 751–775 Vol. 8 Read

Ch. 751The Empire's Assessment of Mo Li; Karigulio's Arrogance and Composure

Karigulio believed the Empire’s forces would defeat the Demon Country Federation, especially with its weapons against Veldora, but he remained wary of Morax, whom the Empire considered its greatest threat. He followed the battle plan and ordered the army to camp before the Federation’s gates to begin its suppression.

  • Karigulio received word that negotiations on the rear battlefield had failed and fighting had begun.
  • He assumed the Empire’s Magic-infused Tank unit and Air Force Operations Corps would overwhelm the Federation’s troops and capture the weakened Veldora using Magic Essence Jamming Radiation.
  • Karigulio considered Rimuru and the Rock Dragon King dangerous but believed the Empire could handle Calamity-class beings.
  • He recalled that the Empire’s Marshal and Emperor agreed Morax posed a greater threat than all the Federation’s other forces combined.
  • Karigulio ordered the army to camp before the Federation’s headquarters and carry out the planned suppression.

Ch. 752The Disconnected Frontline; Karigulio's Thoughts

Karigulio learned that the Empire had lost contact with its frontline troops, but convinced himself that the army could still defeat the Demon Country Federation and ordered the assault on the Great Underground Labyrinth. He reached the gates, read their warning, and laughed as he tried to understand it.

  • Karigulio's intelligence officer reported that all contact with the frontlines had been lost.
  • Karigulio speculated that the Storm Dragon Veldora and the Demon Country Federation's forces had disrupted communications, then reasoned that Veldora was no longer in the labyrinth.
  • Karigulio reassured himself that the Empire's Magic-infused Tank Corps and Air Force Operations Corps could not lose, and ordered the army to proceed with the plan to conquer the labyrinth.
  • Karigulio saw the message on the gates, “The weak are not qualified to pass through these gates,” and laughed.

Ch. 753The Labyrinth Battle Begins; Envisioning an Eighty-Floor Great Underground Labyrinth

Karigulio led the Empire’s seven hundred thousand troops into the Great Underground Labyrinth, dismissing its warning and planning around the threat of being cut off from supplies. As the vanguard entered the unrestricted labyrinth, he assumed it had eighty floors and believed his army was certain to win.

  • Karigulio read the warning above the gate, laughed it off as a taunt, and focused on the need to fight.
  • Karigulio ordered his adjutant to prepare compressed rations, and the adjutant concluded that the monsters’ supply strategy had been exposed.
  • The Empire’s seven hundred thousand mecha-enhanced troops prepared to invade the Great Underground Labyrinth.
  • The vanguard entered the labyrinth, beginning the conquest battle in a labyrinth with all its restrictions removed.
  • Karigulio doubted the reports of one hundred floors, estimated that the labyrinth had eighty, and believed victory was within reach.

Ch. 754The Uneasy Imperial Army; Rimuru and Karigulio's Perfect Coordination

Karigulio sent the Imperial army into the Great Underground Labyrinth, where groups of a thousand soldiers were teleported to other floors. After identifying the cause, he ordered the advance to continue, while Rimuru watched from the hundredth-floor control room and saw the invasion unfolding as expected.

  • Karigulio sent enhanced mech soldiers into the labyrinth, and the first thousand vanished as contact with them was cut off.
  • Karigulio ordered his adjutant to calm the troops and send in more soldiers so he could learn what had happened.
  • Karigulio discovered that each group of a thousand was teleported to other floors, then explained the mechanism to his soldiers.
  • Karigulio dismissed the teleportation as an enemy trap and ordered the Imperial army to resume its advance.
  • Rimuru watched Karigulio's orders from the hundredth-floor control room and concluded that the Imperial army was following his expectations.

Ch. 755Xiao's Growth; A Stubborn, Obsessive Temper

Rimuru watched Karigulio lead the Imperial army into the Great Underground Labyrinth and believed victory was assured. Mo Li reflected on Xiao’s extraordinary growth and decided he should prepare to become an Awakened Demon King after the battle.

  • Rimuru declared victory as Karigulio directed the mechanized army toward the labyrinth, while Diablo praised her and Carrera looked on with disgust.
  • Mo Li watched the Ninetieth Floor and considered testing Xiao’s progress in the coming battle.
  • Mo Li recalled that Xiao had repeatedly refused awakening so he could keep training and become stronger within the Demon Lord Seed realm.
  • Xiao defeated Hinata Sakaguchi and continued training until he reached the limits of his current realm, surpassing Green and Blue in strength.
  • Mo Li concluded that Xiao should prepare to advance into an Awakened Demon King after the battle.

Ch. 756Four Hundred Thousand Troops Enter; Karigulio Thinks He Has Seen Through Everything

Karigulio sent hundreds of thousands of Imperial troops into the Great Underground Labyrinth, where they gathered treasures but failed to return. After learning that challengers needed to collect keys and a clearance certificate, he concluded that the Calamity-class Rock Dragon King was resisting them and sent in more troops.

  • Karigulio's army established basic contact with soldiers inside the labyrinth and brought out valuable treasures, including a Legendary Grade weapon.
  • Karigulio mocked Rimuru and continued sending troops into the labyrinth to seize its treasures.
  • After four hundred thousand soldiers entered without anyone returning, Karigulio questioned why the labyrinth remained unchanged.
  • Karigulio's adjutant explained that challengers had to defeat ten floor guardians for keys and another guardian for a clearance certificate before reaching the Labyrinth Master.
  • Karigulio decided the Rock Dragon King must be resisting the army and dispatched more Imperial troops into the labyrinth.

Ch. 757Sixty-Five Hundred Thousand Army; Karigulio Goes All In

Karigulio sent 650,000 mech-enhanced Imperial troops into the Great Underground Labyrinth, believing the force was needed to defeat the Rock Dragon King and other threats. He left only 50,000 troops behind and watched the entrance, hoping his gamble would succeed.

  • Karigulio decided that 400,000 troops were not enough to face the Rock Dragon King and sent another 200,000 soldiers into the labyrinth.
  • Karigulio committed 150,000 more troops, bringing the force inside the labyrinth to 650,000 and leaving 50,000 behind.
  • An adjutant questioned the risk, and Karigulio argued that committing the larger force offered the best chance against the Rock Dragon King and other labyrinth monsters.
  • Karigulio overlooked that Rimuru was a True Demon King and that the labyrinth’s strongest residents could overwhelm the Imperial troops.
  • Karigulio stared at the labyrinth entrance and prayed for an Imperial victory.

Ch. 758The Empire's Crushing Losses; Rimuru and the Others' Alt Accounts

The imperial soldiers advanced through the Great Underground Labyrinth, moving from early victories into deadly battles against endless monsters and traps. They reached the hellish floors from the 51st to the 59th, where Rimuru, Veldora, Azhdaha, and Milim’s old alt accounts waited among the hidden threats.

  • Imperial soldiers gathered on the 41st through 48th Floors, defeated monsters, collected treasure, and advanced with growing confidence.
  • On the 49th Floor, the soldiers struggled against an apparently endless tide of Slimes and fled to the next floor.
  • On the 50th Floor, Storm Serpents’ poison caused heavy casualties, and reinforcements fought for five days and nights before the soldiers pushed onward.
  • The soldiers encountered lethal traps and hidden monsters across the 51st through 59th Floors.
  • Rimuru, Veldora, Azhdaha, and Milim’s alt accounts were among the powerful monsters waiting in the shadows.

Ch. 759Gadra's Show of Loyalty; Rimuru's Fantasy

The Great Underground Labyrinth devastated the Empire’s invading army, while Gadra fought its surviving elites on the sixtieth floor to prove his loyalty to Rimuru. Watching from the hundredth-floor control room, Rimuru collected the fallen soldiers’ souls and imagined the Demon Country Federation’s future strength—and her own future with Ari.

  • The Labyrinth’s monsters and traps slaughtered most of the Empire’s 650,000 soldiers, including attacks by powerful alt characters and Velgaia.
  • The Imperial soldiers who reached the sixtieth floor recognized Gadra’s voice in the humanoid weapon he had created and began fighting him.
  • Gadra showed his loyalty to Rimuru by attacking the Imperial elites without holding back.
  • Rimuru watched from the control room as the Labyrinth collected the souls of fallen soldiers through a channel created by the King of Wisdom.
  • Rimuru imagined using the souls to awaken six Demon Kings and pictured a peaceful future in which she married Ari and raised a family.

Ch. 760Rimuru's Troubles; Adaman, the 'Undead King'

Rimuru worried about her appearance and her rivals for Mo Li’s affection while Diablo tried to interpret her changing moods. Meanwhile, the Imperial Army advanced through the labyrinth until Adaman, the 'Undead King,' awaited them on the Sixty-Eighth Floor.

  • Rimuru imagined marrying Mo Li and living with him, then fretted over the women she believed were interested in him.
  • Rimuru lamented that King of Wisdom’s growth plan had not changed her figure, despite her following its advice for nearly a year and a half.
  • Diablo watched Rimuru’s shifting expressions and wondered what troubled her, while Mo Li chose to keep drinking tea instead of interrupting her.
  • The Imperial Army fought through the undead- and insect-filled floors from the Sixty-First to the Sixty-Seventh.
  • Adaman, one of the Ten Great Labyrinth Masters and the 'Undead King,' waited for the Imperial Army on the Sixty-Eighth Floor.

Ch. 761Vast as the Sea: The Undead Army, and the Powerful, Stylish Adaman

Adaman, the Undead King, waited for the Imperial army on the sixty-eighth floor and prepared to wipe out every soldier who reached him. After the last soldiers arrived, he revealed his undead army and began the battle.

  • Imperial soldiers entered the dark boss room on the sixty-eighth floor and grew wary of the absence of monsters.
  • Adaman sensed the growing number of Imperial soldiers and waited until they had all arrived.
  • Adaman revealed himself on his throne alongside Alberuth and the Undead Dragon, then welcomed the soldiers to his realm.
  • Adaman summoned a vast undead army as the Undead Dragon took to the sky and Alberuth drew his sword.
  • The Imperial army faced Adaman's forces, and the great battle began.

Ch. 762The Powerful Yapitto and Adaman; Two Primordials Discover Their Kindred Spirit

Adaman and Yapitto slaughtered the Imperial Army as it fled from the Sixty-Eighth Floor to the Sixty-Ninth, astonishing Rimuru and the other observers. Rimuru’s confidence in the labyrinth’s strength grew, while Diablo and Carrera noticed their shared jealousy of Mo Li’s closeness with Rimuru.

  • Adaman’s undead army overwhelmed the Imperial Army on the Sixty-Eighth Floor, and he personally joined the attack after some soldiers escaped to the next floor.
  • Yapitto led her Legion Bees into battle on the Sixty-Ninth Floor and helped kill every Imperial soldier who entered.
  • Rimuru and the Demon Country cadres watched the battle from the control room, and Rimuru asked Mo Li whether he had known how powerful the Ten Great Labyrinth Masters were.
  • Mo Li said he had known a little about their strength, and Rimuru relaxed after seeing the labyrinth masters defeat the Imperial Army.
  • Diablo and Carrera both watched Rimuru sit on Mo Li’s lap and recognized the jealousy in each other’s expressions.

Ch. 763The Empire Soldiers' Contempt; Ze'Chion Mistaken for Rimuru

Ze'Chion faced ten thousand Imperial soldiers on the seventieth floor of the Great Underground Labyrinth, where their commander underestimated him and sent two thousand troops to attack. After Ze'Chion wiped them out without being injured, the commander mistook him for Rimuru, enraging Ze'Chion.

  • Diablo and Carrera silently formed an alliance after watching Rimuru seek affection from Mo Li.
  • Ze'Chion assessed the ten thousand Imperial soldiers and found their strongest fighter was only A-rank.
  • The Imperial commander dismissed Ze'Chion as a Demon Lord Seed and sent two thousand soldiers to kill him.
  • Ze'Chion slaughtered all two thousand soldiers, then challenged the remaining Imperial troops to attack together.
  • The commander mistook Ze'Chion for the legendary Demon King Rimuru, and Ze'Chion erupted in anger.

Ch. 764Ze'Chion's Overwhelming Strength; A One-Sided Battle

Ze'Chion slaughtered the Empire's mech-modified soldiers on the seventieth floor of the Great Underground Labyrinth, proving that even eight thousand attackers could not threaten him. Rimuru watched from the control room, still worried, while Mo Li knew the war was already decided; Ze'Chion killed the imperial general and every remaining soldier.

  • Ze'Chion calmly introduced himself as one of the Ten Great Labyrinth Masters and condemned the imperial soldiers for offending his lord.
  • Rimuru watched from the control room and worried that the remaining eight thousand soldiers might overwhelm Ze'Chion, while Mo Li remained confident in Ze'Chion's strength.
  • The imperial general offered a three-rank promotion to whoever killed Ze'Chion and ordered the soldiers to attack together.
  • Ze'Chion slaughtered thousands more soldiers, then unleashed a terrifying aura that stopped the fleeing survivors before killing them all.
  • Ze'Chion beheaded the imperial general, who died staring in disbelief at his own headless body.

Ch. 765Everyone Shocked by Ze'Chion; Diablo's Feeling

Ze'Chion slaughtered the Imperial forces on the seventieth floor, including their commander, and Rimuru and the others watched in shock from the labyrinth control room. The chapter ended with Benimaru resolving to grow stronger and Diablo sensing that Ze'Chion might be his natural enemy.

  • Ze'Chion killed every Imperial soldier on the seventieth floor and took the commander’s head, deciding it might be useful.
  • Rimuru watched Ze'Chion’s victory and judged his strength comparable to a Human Saint and a true demon king.
  • Rimuru reflected that her four Ultimate Skills and enormous magicule reserves were wasted because she had not mastered combat techniques like Mo Li.
  • Benimaru silently acknowledged that Ze'Chion was stronger than him and resolved to improve after the war.
  • Diablo watched Ze'Chion and sensed that the insect-type monster had been born to restrain him.

Ch. 766"Unfathomable Rimuru"; Poor Diablo

Diablo watched Ze'Chion and wrongly concluded that Rimuru had cultivated him to restrain Ultima, Testarossa, and Carrera. In reality, Raphael had created Ze'Chion specifically to guard against Diablo, whose loyalty Rimuru found difficult to explain.

  • Benimaru watched Ze'Chion on the screen with blazing fighting spirit, while Diablo sensed that the insectoid might be his natural enemy.
  • Diablo considered Ze'Chion's status and potential, then decided Rimuru had raised him to keep the Primordial Demons in check.
  • Diablo admired Rimuru for what he imagined was her far-reaching plan, though Rimuru had never intended any of it.
  • Raphael had cultivated Ze'Chion specifically to guard against Diablo, believing the Original Black's service to Rimuru was too suspicious to trust.

Ch. 767Rimuru's Wariness of Little Di; The Beautiful Lady of the City, Nine Demon Luo

Rimuru remained deeply suspicious of Diablo and had King of Wisdom cultivate Ze'Chion as a countermeasure against him. Meanwhile, Nine Demon Luo and her illusion beasts nearly wiped out the Imperial soldiers on the Great Underground Labyrinth’s Seventy-First through Eightieth Floors, revealing her strength to Rimuru, Benimaru, and the others.

  • King of Wisdom cultivated Ze'Chion to restrain Diablo, whom Rimuru distrusted despite his loyalty and service.
  • Rimuru’s suspicions deepened after learning Diablo had once rivaled Guy and that Guy was wary of him.
  • Rimuru also suspected Diablo because he showed little respect for Morax, whom she revered as Ari.
  • On the Great Underground Labyrinth’s Floors Seventy through Eighty, Nine Demon Luo commanded illusion beasts that repeatedly revived after being killed.
  • Nine Demon Luo and her beasts nearly wiped out the nearly one hundred thousand Imperial soldiers, and Rimuru, Benimaru, and the others witnessed her power.

Ch. 768Xiao Above the Ten Great Labyrinth Masters; Xiao's Request

Xiao asked to fight the Empire’s full hundred-thousand mechanized army alone by clearing the traps from the Eighty-first through Eighty-ninth Floors. Veldora and Ramiris objected, but Azhdaha agreed to Xiao’s request.

  • Rimuru and the others saw Nine Demon Luo and her phantom beasts nearly wipe out the Imperial army on the Eightieth Floor.
  • Xiao decided to remove the traps on the floors above the Eightieth so he could face the Empire’s soldiers alone and prove his strength to the Geo Archon.
  • Veldora rejected Xiao’s plan as too dangerous, and Ramiris agreed with him.
  • Azhdaha agreed to Xiao’s request, leaving Veldora and Ramiris shocked.

Ch. 769Veldora and Ramiris's Fluctuating IQs; Xiao's Little Scheme

Xiao asked to face the Empire's army, and Azhdaha agreed after reminding Veldora and Ramiris that the Great Underground Labyrinth could revive him. Xiao concealed that he planned to go without a Resurrection Bracelet, seeing the Hundred Thousand Army as his only chance to break through his martial arts bottleneck.

  • Azhdaha agreed to Xiao's request, explaining that Xiao had made up his mind and could not be stopped.
  • Veldora and Ramiris objected because they feared for Xiao's safety and knew how much Morax valued him.
  • Azhdaha reminded them that the Great Underground Labyrinth could revive its monsters, and Ramiris and Veldora realized Xiao could return if he died there.
  • Xiao stayed silent about his plan to face the Empire's army without a Resurrection Bracelet.
  • Xiao believed the Hundred Thousand Army was his only chance to break through the barrier in his martial arts and approach Morax's level.

Ch. 770Everyone's Wild Speculation; Mo Li's Anger

Xiao set out to face the Imperial army alone, hoping a life-or-death battle would break through his limits. In the Great Underground Labyrinth’s control room, Mo Li realized that Veldora, Azhdaha, and Ramiris were clearing traps at Xiao’s request and became furious that Xiao had ignored his instructions and risked his life.

  • Xiao decided to fight the Imperial army alone and hurried to the Ninetieth Floor, intending to battle his way up from there.
  • Rimuru, Benimaru, Diablo, and the others watched Veldora, Azhdaha, and Ramiris remove the traps on Floors Eighty-one through Eighty-nine, and they could not understand why.
  • Mo Li realized that the cleared floors would let the Imperial army reach Xiao and erupted in anger, frightening everyone in the control room.
  • Mo Li withdrew his aura after Rimuru gasped that she could not breathe, and Rimuru collapsed across his thigh in her slime form.
  • Mo Li told Rimuru that he was angry because Xiao had ignored his instructions and put his life at risk.

Ch. 771The Three Who Were Dragged Here; Azhdaha's Explanation

Mo Li brought Ramiris, Veldora, and Azhdaha to the control room to question them about removing traps from the Eighty-first through Eighty-ninth Floors. Azhdaha explained that they had done so because Xiao wanted to challenge an Imperial army of one hundred thousand alone, leaving Mo Li to react with a sharp rebuke.

  • Mo Li left the control room to confront Azhdaha and Veldora after realizing they had likely acted at Xiao's request.
  • Mo Li returned with Ramiris, Veldora, and Azhdaha, who had been guarding the hundredth floor of the Great Underground Labyrinth.
  • Mo Li asked the three to explain why they had removed the traps from the Eighty-first through Eighty-ninth Floors.
  • Mo Li called on Azhdaha to answer after Veldora struggled to explain himself.
  • Azhdaha described Xiao's plan to challenge an Imperial army of one hundred thousand alone, and Mo Li objected, saying, "Nonsense!"

Ch. 772Azhdaha Wants to Bring Xiao Back; Xiao's Choice

Mo Li learned that Xiao planned to face the Empire's Hundred Thousand Army alone and furiously condemned the others for allowing it. After discovering Xiao had refused to wear his Resurrection Bracelet, Mo Li stopped Azhdaha from retrieving him and accepted that Xiao had chosen this dangerous trial.

  • Azhdaha explained that Xiao intended to challenge the Empire's Hundred Thousand Army alone, and Mo Li angrily called the plan reckless.
  • Azhdaha, Veldora, and Ramiris argued that Xiao could revive with a Resurrection Bracelet inside the Great Underground Labyrinth, but Mo Li warned that Xiao lacked the reserves to fight the entire army.
  • Mo Li revealed that Xiao had not worn the Resurrection Bracelet, leaving Azhdaha, Veldora, and Ramiris shocked.
  • Azhdaha realized Xiao was risking his life to grow stronger and prepared to bring him back.
  • Mo Li stopped Azhdaha and let Xiao continue because it was his choice.

Ch. 773Everyone's Curiosity; Xiao Guards Ten Floors Alone

Mo Li allowed Xiao to face the Empire’s army alone on the Ninetieth Floor, confident he could intervene if Xiao was endangered and planning to reward him if he succeeded. As the others watched, Xiao waited in the floor boss chamber, and the arriving enemy made its presence known.

  • Azhdaha tried to retrieve Xiao by force, but Mo Li stopped him and chose to respect Xiao’s decision.
  • Mo Li resolved to advance Xiao to the realm of a True Demon King after the war and considered granting him an Ultimate Skill.
  • Diablo and Rimuru inferred that Mo Li had a plan and watched Xiao, though Rimuru worried about his chances against the Empire’s army.
  • Xiao sat alone with his spear in the Ninetieth Floor’s boss chamber and heard the door creak as the enemy arrived.

Ch. 774The Cautious Imperial General; First Meeting with Xiao

Xiao waited alone in the Ninetieth Floor’s Master’s room as the Empire’s troops advanced through the trap-free labyrinth. The cautious commander gathered all one hundred thousand soldiers before opening the door, where they found Xiao poised with his spear.

  • Xiao sat waiting in the Ninetieth Floor’s Master’s room as the Imperial army approached.
  • Seventy thousand Imperial soldiers reached the Ninetieth Floor after advancing through the empty, trap-free floors.
  • The Mecha Legion commander sensed danger behind the Floor Master’s door and ordered scouts to gather the remaining troops.
  • The commander assembled the remaining thirty thousand soldiers, bringing the Imperial force to one hundred thousand.
  • The door opened, revealing Xiao seated with his spear, and the commander felt overwhelming danger.

Ch. 775Xiao's Impression on the Empire; a Rank Established Specifically for Mo Li

Xiao prepared to face the Empire’s Hundred Thousand Army alone, hoping to break through, while the Imperial commander mistook him for Rimuru and realized he was an exceptionally powerful being. Xiao identified himself as the Geo Archon’s Guardian Yaksha, and the chapter left the commander stunned by the Empire’s intelligence failure as Rimuru watched from the Great Underground Labyrinth.

  • Xiao sensed the Imperial army gathering and waited until the Hundred Thousand Army had assembled before preparing to fight them alone.
  • The Imperial commander felt Xiao’s overwhelming Killing Aura and judged him to be a True Demon King or stronger.
  • The commander recalled the Empire’s ranks for powerful beings, including the Morax-class rank established specifically for Morax.
  • The commander mistook Xiao for Rimuru Tempest, and Xiao corrected him by identifying himself as the Guardian Yaksha beneath the Geo Archon.
  • In the Great Underground Labyrinth, Rimuru complained that people kept mistaking others for her, while Mo Li explained that few people could recognize them by sight.
  • The Imperial commander realized his intelligence bureau had failed to identify Xiao and wondered how it had overlooked such a terrifying existence.
Arc 31 of 49