Chapter Summaries

Carrera secretly replaced Mo Li’s tea set with one bearing his aura, prompting Shuna to silently confront her. Meanwhile, Rimuru’s rumors and warning at the Great Underground Labyrinth drew the Empire toward a trap guarded by two Calamity-class beings.

• Carrera used Steal the Sky and Change the Sun, a Tanuki Swaps Prince, to exchange Mo Li’s tea set, and Mo Li drank from the new cup without realizing the switch.
• Shuna noticed Carrera’s trick and glared at her, while Carrera realized she had been exposed and refused to give the tea set back.
• Shuna and Carrera suppressed their anger and continued the meeting without drawing attention from the others.
• Gadra informed Karigulio about the Demon Country Federation, which Rimuru and Ramiris had moved to the deepest level of the Great Underground Labyrinth.
• Rimuru spread rumors about the Labyrinth’s treasures and placed a warning on its gate, luring the Empire’s seven hundred thousand troops toward a dungeon guarded by Veldora and the Rock Dragon King.

Karigulio ordered the Empire’s seven hundred thousand troops to form up outside the Great Underground Labyrinth, wary of its Calamity-class guardians Veldora and Azhdaha. Rimuru and his allies judged the battle likely to end in their favor as the guardians left to prepare for the coming fight.

• Karigulio reviewed intelligence about Morax, Veldora, and Azhdaha and grew wary of the two Calamity-class beings guarding the labyrinth.
• Karigulio chose caution and arranged the Empire’s seven hundred thousand troops into formation before the labyrinth entrance.
• Rimuru watched the Empire’s movements and told Benimaru that victory seemed assured.
• Benimaru explained that Veldora and Azhdaha could defend the labyrinth even against powerful Imperial opponents.
• Veldora and Azhdaha reassured Rimuru, then left with Ramiris to prepare for the decisive battle.

Mo Li stayed behind to oversee the coming battle while the Demon Country Federation’s forces prepared to face the Empire’s army. In a secret hall, the Great Underground Labyrinth’s guardians gathered, and Xiao silenced Nine Demon Luo and Yapitto as their argument over who was strongest threatened to become a fight.

• Azhdaha and Veldora left the control room to guard the final checkpoint, while Mo Li remained with Rimuru to observe the battle and protect him.
• Mo Li decided to let the Demon Country Federation’s cadres and labyrinth forces handle the Empire’s troops, keeping himself as their safety net if a threat proved too great.
• The Ten Great Labyrinth Masters and other guardians gathered around a silver table in a secret hall, with Xiao seated at its head.
• Nine Demon Luo declared herself the strongest and challenged Yapitto, who rejected her claim and agreed to fight.
• Xiao ordered them to be quiet, and Nine Demon Luo and Yapitto immediately backed down.

Veldora, Azhdaha, and Ramiris gathered the Great Underground Labyrinth’s rulers to discuss the unprecedented war and promised everyone a chance to fight. Azhdaha warned Xiao not to expect opponents who could match him, leaving his hopes for a worthy challenge uncertain.

• Xiao silenced the gathered rulers before Veldora, Azhdaha, and Ramiris entered the hall.
• Ramiris explained that the war posed an unprecedented crisis for the Great Underground Labyrinth and asked everyone for their thoughts.
• Nine Demon Luo and Yapitto argued over how to respond, and Veldora intervened by promising every ruler a chance to fight.
• Azhdaha said the coming battles would resolve the unfair distribution of opponents among the floor rulers.
• Xiao asked whether he would face suitable opponents, and Azhdaha advised him not to expect anyone evenly matched with him.

Azhdaha warned Xiao that the Empire had almost no fighters who could match his strength, leaving Xiao disappointed that he could not test himself in the current war. Azhdaha told him to defeat weaker enemies for now and wait until the conflict escalated, and Xiao accepted the plan.

• Azhdaha explained that only a handful of the Empire's strongest fighters could serve as opponents for Xiao, and none were likely to enter the current battle.
• Xiao felt disappointed because he wanted to test his strength and believed his role was to help Lord Emperor, but he could no longer find work doing so.
• Azhdaha told Xiao to crush weaker enemies for now and wait until stronger opponents appeared later in the war.
• Xiao thanked Senior Azhdaha, and the Ten Great Labyrinth Masters realized that Xiao was simply too strong for the war's early stages.

Veldora and Ramiris explained the labyrinth’s war plan, which would teleport up to 540,000 imperial soldiers into its middle floors for the guardians to fight. They described strict rules for escaping and reaching the Hundredth Floor, where Veldora and Azhdaha awaited, while warning that a dangerous enemy might threaten Rimuru.

• Azhdaha told Xiao that he was too strong for the war’s early stages and would have to wait for stronger opponents to appear.
• Veldora and Ramiris explained that imperial soldiers would be teleported into the labyrinth in batches of one thousand, filling its floors with up to 540,000 enemies.
• Ramiris warned the guardians that the army might include someone capable of threatening Rimuru, prompting them to ready themselves for battle.
• Ramiris explained that enemies could not leave the labyrinth without clearing it, which required collecting ten keys, defeating Xiao on the Ninetieth Floor, and earning his Guardian’s Proof.
• Ramiris revealed that challengers who met those requirements would face Veldora and Azhdaha together on the Hundredth Floor.

Ramiris explained that the Imperial Army would face seemingly endless challenges in the Great Underground Labyrinth, with no reliable way to escape or win. The Ten Great Labyrinth Masters prepared for the invasion, and Beretta announced that she would relinquish her leadership position to whoever earned the most merit.

• Ramiris's rules required the Empire to defeat the Ten Great Labyrinth Masters, collect their keys, overcome Xiao, and then face Veldora and Azhdaha, with further challenges awaiting even if they won.
• Ramiris warned that enemies who rested before the Fortieth Floor would face Gozul and Mezul, and entrusted the coming battle to the gathered defenders.
• Adaman said he looked forward to killing the Imperial soldiers, while Nine Demon Luo challenged Yapitto to compete over who killed more enemies, and Yapitto accepted.
• Beretta announced that, as Labyrinth Administrator and leader of the Ten Great Labyrinth Masters, she would give her position to whoever earned the most outstanding merits in the campaign.
• The other Ten Great Labyrinth Masters, including Ze'Chion, became eager to claim Beretta's position.

Beretta relinquished the leadership of the Ten Great Labyrinth Masters and appointed Gadra, who became the Magic King. Ramiris and Veldora then revealed that Rimuru and Mo Li might watch the coming battle, leaving the masters excited to prove themselves.

• Beretta gave up the leadership and all other positions among the Ten Great Labyrinth Masters, transferring the vacant seat to Gadra.
• Beretta appointed Gadra a Ten Great Labyrinth Master and named him the Magic King, assigning him to the sixtieth floor with Adaman.
• Ramiris announced that Rimuru would watch the battle to choose the next leader and let the masters demonstrate their abilities.
• Ze'Chion and the other masters grew excited at the prospect of earning Rimuru's recognition.
• Veldora added that Mo Li might watch the battle too, provoking an even stronger reaction from everyone in the hall.

Veldora revealed that Mo Li and Rimuru would watch the Labyrinth Corps’ battle, leaving Xiao and the other monsters overwhelmed by nervousness and awe. Ze'Chion urged everyone to fight with everything they had and win a magnificent victory for the two lords.

• Veldora told the assembled Labyrinth Masters that Rimuru had entrusted them with the mission to test the Labyrinth Corps’ strength.
• Veldora revealed that Mo Li might watch their battle, startling the crowd.
• Xiao rose from his seat, shaken by the news that the Geo Archon would observe their performance.
• The monsters reflected on Mo Li’s victories and regarded him as an absolute, god-like figure.
• Ze'Chion addressed everyone and urged them to fight without retreating and secure a magnificent victory for Mo Li and Rimuru.

The Ten Great Labyrinth Masters rallied to win a glorious victory for Rimuru and Mo Li, while Rimuru and Mo Li watched from the labyrinth control room. The chapter ended as Karigulio surveyed the Empire’s 700,000-strong army.

• Ze'Chion urged the Ten Great Labyrinth Masters to give everything for Rimuru and Mo Li, and they pledged to return victorious.
• Veldora, Ramiris, Azhdaha, and Xiao watched the Masters’ display of devotion, and Xiao vowed that everything was for Lord Emperor.
• Rimuru and Mo Li sneezed while watching the screen, and Mo Li sensed that a distant group was cheering for him without hostility.
• Mo Li told Rimuru to keep watching because she would soon see what had happened.
• Karigulio surveyed the Empire’s 700,000 troops, pleased with their formation and imposing aura.

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.

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.

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.

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.

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.

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.

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.

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.

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.

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.