Chapter Summaries

Mo Li reprimanded Xiao for recklessly fighting a hundred thousand imperial soldiers, then explained that Xiao’s Divine Realm power had outgrown his Demon Lord Seed body and realm. Xiao agreed to advance to the True Demon King realm after recovering, and Mo Li entrusted him with the soldiers’ souls and promised to guard his advancement ritual.

• Xiao awakened in the Pool of Life, and Mo Li pressed him back into the water so his injuries could continue healing.
• Mo Li praised Xiao’s growth but sternly rebuked him for risking his life against a hundred thousand imperial soldiers without the Resurrection Bracelet or skills.
• Xiao apologized, promised not to act without Mo Li’s decree, and accepted Mo Li’s warning against repeating his recklessness.
• Mo Li explained that Xiao had reached the Demon Lord Seed realm’s limit and that his Divine Realm spiritual power and technique were constrained by his weaker body and realm.
• Xiao agreed to advance to the True Demon King realm, and Mo Li told him to recover first, gave him the soldiers’ souls, and promised to guard the ritual.

After Xiao survived his reckless battle with the Empire’s army, Mo Li gave him the captured souls and ordered him to recover while he stood guard. On the surface, Karigulio sent a new elite raid party into the labyrinth, while Rimuru and the monster executives watched for the possible threat to her.

• Mo Li confirmed Xiao was safe, gave him the souls of the slain Imperial soldiers, and told him to recover before attempting an advancement ritual.
• Mo Li returned to the control room, reassured Azhdaha and Veldora that Xiao was unharmed, and Benimaru resumed planning the war.
• Karigulio realized the Empire’s intelligence about the labyrinth was unreliable and that hundreds of thousands of soldiers had been lost without sending back reports.
• Karigulio dispatched four Imperial powerhouses and a hundred elite soldiers into the Great Underground Labyrinth, withholding the full extent of the earlier defeat.
• Rimuru and the monster executives watched the new expedition and searched for the person Chloe had warned might threaten Rimuru, prepared to use the Demon Country’s strongest fighters if needed.

Rimuru remained cautious as the Eastern Empire sent another force into the Great Underground Labyrinth, unaware of the safeguards Mo Li had secretly placed on her. Ramiris contacted Rimuru about requests from Gadra and Nine Demon Luo, and Benimaru supported allowing Nine Demon Luo to pursue her revenge.

• The Demon Country Federation searched for threats to Rimuru, while Mo Li and King of Wisdom kept his powerful safeguards on her secret.
• Rimuru stayed alert to Karigulio's continued deployment of troops and told Benimaru not to relax the defenses.
• Mo Li watched Rimuru's preparations and regarded the invasion as an opportunity for her to grow, while Diablo secretly kept an eye on him.
• Ramiris contacted Rimuru about the latest hundred Imperial attackers and explained that the Ten Great Labyrinth Masters wanted to confront them.
• Gadra asked to recruit former companions among the attackers, while Nine Demon Luo recognized the human who had destroyed her homeland and sold her to Clayman.
• Rimuru asked Benimaru about Nine Demon Luo's request, and he said no one should be stopped from taking revenge for such a blood feud.

Rimuru ordered Adaman to attack the disciplined Imperial elite force that had established a base on the sixty-eighth floor. The battle became a three-on-three struggle between the strongest Imperial fighters and Adaman’s champions, with the Demon Country Federation holding the advantage but the outcome still uncertain.

• Rimuru agreed with Benimaru that the blood feud against the Empire could end only with one side’s death, then assigned the coming matchups.
• About a hundred Imperial elites set up a headquarters on the sixty-eighth floor and sent scouts to search for missing soldiers, unaware that Adaman had erased every trace of them.
• Rimuru ordered Adaman to wipe out the intruders, and he led his undead army in an attack on the Imperial force.
• The Imperial soldiers regrouped and fought back, while three of their strongest fighters faced Adaman, Alberuth, and the Undead Dragon.
• After more than an hour, the wider battle ended in mutual destruction, leaving the three Imperial fighters locked in a stalemate against Adaman and his allies.
• Diablo and Benimaru judged that the Federation still held the advantage, though the Empire could turn the fight if its swordsman defeated Alberuth.

Rimuru’s forces gained the upper hand as Alberuth held off Krishna and Adaman and the Undead Dragon overwhelmed their opponents. With victory seemingly assured, Rimuru turned her attention to Gadra on the sixtieth floor.

• Diablo and Benimaru reassured Rimuru that their side had the advantage and that Veldora and Ze'Chion would not need to intervene.
• Krishna introduced himself as a seventeenth-ranked member of the Emperor's Royal Guard Knights, while Alberuth humbly denied being a powerhouse and credited his strength to his benefactors.
• Angered by Alberuth's humility, Krishna attacked him with his Legendary Grade holy sword, and Alberuth met the attack without falling behind.
• Reha, ranked ninety-eighth, struggled against Adaman, while Bazan, ranked thirty-fifth, was being beaten down by the Undead Dragon.
• Rimuru watched the battle and concluded that her side had victory in the bag, then looked toward Gadra on the sixtieth floor.

Lucius and Raymond struggled through the Great Underground Labyrinth to find Gadra and Shinji, only to learn that their teacher and companions had defected to the Demon Country Federation. After hearing about the Federation’s formidable defenders, the two began considering defecting themselves.

• Rimuru watched the Empire’s forces falter and turned his attention to Gadra’s floor, where Lucius and Raymond were exploring.
• Lucius and Raymond endured the deadly floors of the labyrinth and reached the sixtieth floor, determined to find Gadra and Shinji.
• Shinji met Lucius and Raymond and told them that he and his companions had defected to the Demon Country Federation.
• Gadra appeared and confirmed his identity, then began explaining why he and the others had changed sides.
• Gadra described the Federation’s powerful defenders, including True Demon Kings and multiple Primordial Demons, leaving Lucius and Raymond stunned and considering defection.

Lucius and Raymond joined the Demon Country Federation after Gadra explained its strength and they chose to follow their teacher out of the Empire. Meanwhile, on the Sixty-Ninth Floor of the Great Underground Labyrinth, Imperial Major General Miniz criticized Karigulio’s command as he strolled through the battlefield.

• Gadra told Lucius and Raymond that the Demon Country Federation held multiple beings comparable to True Demon Kings and Primordial Demons, and Shinji tried to persuade them to join.
• Lucius and Raymond agreed to join the Demon Country Federation, explaining that they trusted Gadra and had little loyalty to the Empire.
• Gadra persuaded the two men to enlist, and Rimuru placed precautions on them before assigning them to Gadra.
• On the Sixty-Ninth Floor, Miniz walked through the labyrinth and mocked Karigulio for the battle’s losses and failure to win.

Imperial Major General Miniz fought Queen Bee Yapitto on the Sixty-Ninth Floor of the Great Underground Labyrinth. Yapitto lured him to her Queen’s Hall, where the two prepared to begin their second round.

• Miniz mocked Karigulio in private and eagerly set out to fight monsters in the labyrinth.
• Miniz used his Unique Skill, “Suppressor,” to crush the assassin bee swarm and taunted Queen Bee Yapitto.
• Yapitto confronted Miniz, dodged his gravity-based attack, and moved too quickly for him to track.
• Miniz spread a force field through the narrow passage and pressed Yapitto toward the hall, forcing her to retreat.
• Yapitto stopped in her Queen’s Hall and challenged Miniz to continue the fight there.

Yapitto fought Imperial Major General Miniz in the Queen's Hall, dodging his powerful Suppressor force fields while searching for a weakness. As Rimuru watched from the control room, the battle remained uncertain.

• Miniz and Yapitto began their second round, with Yapitto using her speed to evade his attacks and Miniz blocking her blades with his gray aura.
• Miniz unleashed Suppressor, cracking the Queen's Hall ceiling when Yapitto dodged the force field.
• Miniz grew furious and pressed his attack, while Yapitto continued testing Suppressor and searching for its weakness.
• Yapitto fought back with her stingers, wings, and shockwaves while following Xiao's guidance and resolving to win for Rimuru and Emperor.
• Rimuru watched the battle nervously, and Diablo stepped forward to analyze the situation for him.

Rimuru worried as Yapitto fought Imperial Major General Miniz, but Diablo explained that she was only probing the effects of his Suppressor skill. Yapitto revealed she had conserved her strength, killed Miniz with a final attack, and won a battle that had once ended differently.

• Diablo reassured Rimuru that Yapitto had not yet fought at full strength and was studying Miniz's skill.
• Benimaru watched the battle and reflected on his ambition to catch up to Diablo and Xiao.
• After hours of fighting, Yapitto and Miniz were both badly wounded, and Miniz believed she was near exhaustion.
• Yapitto announced her final attack, while Miniz gathered his remaining power for one last strike.
• Yapitto dodged Miniz's force fields, pierced his chest from behind, and shattered his body into bloody mist.
• Yapitto defeated Miniz, changing the outcome of the battle from the original story.

Yapitto defeated Miniz, while Rimuru considered awakening the Demon Country Federation’s many qualified fighters after the war. On the Eightieth Floor, Nine Demon Luo prepared to face Kansas, the man who had destroyed her home, as he reached the open gates of her mansion.

• Yapitto crushed Miniz on the Sixty-Ninth Floor and used her authority to clean up while she waited for her Legion Bees to revive.
• Rimuru watched Yapitto’s victory and decided to seek enough human souls to awaken the Demon Country Federation’s qualified fighters after the war.
• Nine Demon Luo watched Kansas through a crystal ball and recalled how he had framed Demon Village, killed her mother and people, and captured her for Clayman.
• Kansas explored the Eightieth Floor alone, dismissing the Labyrinth Masters and Guardians as insignificant threats.
• After a day of exploring, Kansas reached a grand mansion whose doors opened as if welcoming him.

Kansas confronted Nine Demon Luo at her manor and mocked her for surviving after he destroyed her clan and handed her to Clayman. The chapter ended with Kansas offering to spare her if she became his pet, while she faced the controlled forms of her mother's Tail Beasts.

• Nine Demon Luo welcomed Kansas at her manor and confronted him over slaughtering her mother and clan.
• Kansas taunted Nine Demon Luo, claiming she owed him gratitude for sparing her by giving her to Clayman.
• Nine Demon Luo attacked with her White Ape, but Kansas summoned a controlled Dark Ape that had belonged to her mother.
• Kansas explained that his Unique Skill, Plunderer, recreated beings he had killed as servants called Darkness.
• Nine Demon Luo summoned the Moon Rabbit and Black Rat, and Kansas summoned their Dark counterparts along with the remaining Tail Beasts.
• Kansas offered to spare Nine Demon Luo if she betrayed Rimuru and became his pet, while eyeing her lecherously.

Nine Demon Luo confronted Kansas and summoned her Eight Legions, overwhelming the five Tail Beasts he controlled. Kansas dodged her attacks and revealed a trump card as the battle turned against him.

• Kansas tried to make Nine Demon Luo submit, but she refused and summoned the Eight Legions from her tails.
• Kansas recognized that Nine Demon Luo had reached Demon King level and reflected on the Empire’s fear of Mo Li’s strength.
• Nine Demon Luo’s Eight Legions suppressed Kansas’s five Tail Beasts, and she tried to ambush Kansas but he evaded her.
• Kansas taunted Nine Demon Luo to provoke her while the Eight Legions continued to overpower his Tail Beasts.
• Kansas recalled his five Dark Tail Beasts and replaced them with an enormous demonic beast shrouded in shadows.

Nine Demon Luo faced Kansas’s strongest puppet: her resurrected mother, the previous Nine-Headed Beast. After regaining her composure, she destroyed the puppet and killed Kansas, completing her revenge.

• Kansas summoned the Dark Fox Spirit, revealing that it was Nine Demon Luo’s dead mother and ordering it to attack her.
• The Dark Fox Spirit crippled most of Nine Demon Luo’s Eight Legions, but Nine Demon Luo recalled the surviving Winged Snake and Dog Realm and steadied herself.
• Nine Demon Luo caught the attacks from Kansas and the Dark Fox Spirit, then restrained the Dark Fox Spirit and tore it apart.
• Nine Demon Luo told Kansas her name and said farewell to her nightmare before killing him with Nine Blades.
• Nine Demon Luo’s revenge was complete.

Nine Demon Luo avenged her mother by killing Kansas and broke free of the obsession that had bound her. As Adaman continued fighting three Imperial Knights on the sixty-eighth floor, Diablo recommended Ze'Chion to reinforce him, and Rimuru weighed whether Ze'Chion was strong enough.

• Nine Demon Luo killed Kansas, completed her revenge, and escaped the shackle of her past.
• Rimuru watched Nine Demon Luo's victory and reflected that she had let her subordinate resolve her own obsession.
• Adaman, Alberuth, and the undead dragon remained locked in a difficult battle against three Imperial Knights.
• Rimuru decided she wanted to end the fight quickly and considered whom to send to help Adaman.
• Diablo recommended Ze'Chion, and Rimuru hesitated over whether his strength was enough.
• Diablo assured Rimuru that Ze'Chion could handle the three knights and might even threaten Diablo after reaching the True Demon King realm.

Rimuru agreed to send Ze'Chion against the three Imperial Knights after Diablo assured him that Ze'Chion was powerful enough to defeat them. Adaman reluctantly teleported the knights away from the sixty-eighth floor, leaving them in Ze'Chion's hands.

• Diablo told Rimuru that Ze'Chion's strength could rival his own and that Ze'Chion was the strongest of the Ten Great Labyrinth Masters after the Labyrinth Kings and Guardian.
• Rimuru approved Diablo's plan for Ze'Chion to take over the fight against the three Imperial Knights.
• Adaman accepted Rimuru's order to send the knights away, despite resenting that he had to surrender his prey and achievements.
• Adaman recalled Alberuth and the Undead Dragon from their fights with Krishna and Bazan, while Reha and the others regrouped warily.
• Adaman used his floor authority to trap Krishna, Reha, and Bazan in a black hole and teleport them away.
• Adaman returned to his throne as the floor went dark, and his voice declared that everything was in Ze'Chion's hands.

After Adaman’s battle ended, Krishna, Reha, and Bazan were sent to Ze'Chion’s floor and given time to recover before facing his trial. The timer reached zero with no reinforcements arriving, and the three entered the arena to challenge the Emperor Bug.

• Adaman returned to his throne after the black hole drew the three Imperial soldiers away, and a voice entrusted everything to Ze'Chion.
• Ze'Chion announced that Krishna, Reha, and Bazan had earned the right to face his trial and gave them time, food, and water to recover.
• Krishna examined the provisions and countdown, concluding that Ze'Chion intended to fight them at full strength.
• The three recovered while speculating that reinforcements might arrive, but no one appeared before the timer ran out.
• Krishna, Reha, and Bazan accepted that the trial was their only choice and stepped through the opening door to face Ze'Chion.

Krishna, Reha, and Bazan entered the trial against Emperor Bug Ze'Chion and found him meditating atop the corpses of Mecha Legion soldiers. Krishna mistook Ze'Chion for the Demon Country Federation's mysterious Calamity-class being, enraging him; the chapter ended as the three prepared to fight Ze'Chion together.

• Krishna, Reha, and Bazan accepted the trial and stepped through the gate to face Ze'Chion, the strongest of the Ten Great Labyrinth Masters.
• Reha used magic to light the pitch-black space, revealing Mecha Legion corpses and Ze'Chion meditating above them.
• Krishna judged Ze'Chion's overwhelming aura to be beyond the Immortal level and speculated that he was the Federation's mysterious Calamity-class being.
• Krishna's guess angered Ze'Chion, who declared himself one of the Ten Great Labyrinth Masters and challenged the three to fight for their lives.
• Krishna urged Reha and Bazan to attack together, and the battle between the Empire's trio and Ze'Chion began.

Ze'Chion defeated Krishna, Reha, and Bazan in less than half a minute, overpowering their attacks with overwhelming strength and defense. In the Great Underground Labyrinth's control room, Rimuru and the others watched in stunned silence.

• Krishna ordered Reha and Bazan to attack Ze'Chion, but Ze'Chion shattered Bazan's Legendary Grade armor and killed him with a single punch.
• Ze'Chion swiftly killed Reha with a hand-strike slash while Krishna called out to her.
• Krishna unleashed his Demonic Dimension Slash after overdrawing his body and soul, but Ze'Chion blocked it with Spatial Distortion Defense Field.
• Ze'Chion cut Krishna in half with Dimensional Life Severing Wave, ending the battle in under half a minute.
• Rimuru and the others watched the fight in the control room, and Rimuru asked in shock whether Ze'Chion was too strong.

After Ze'Chion swiftly defeated the Imperial Trio, Rimuru and the others reacted with shock to his overwhelming strength. Rimuru learned that King of Wisdom had secretly helped train and modify him, while the battle in the Great Underground Labyrinth ended and the war above ground remained.

• Ze'Chion defeated the three Imperial Knights in less than half a minute, shocking everyone watching from the control room.
• Rimuru asked Benimaru whether Ze'Chion was stronger than him, and Benimaru admitted that Ze'Chion had surpassed him for now.
• Diablo and Carrera assessed Ze'Chion as a threat who could outmatch most Primordial Demons, while Mo Li admired his potential.
• Rimuru realized that Ze'Chion's spatial defense resembled an ability of King of Vows and questioned King of Wisdom.
• King of Wisdom revealed that it had secretly guided Ze'Chion and modified his body alongside the teachings of Veldora and Azhdaha.
• Rimuru noted that all enemies in the Great Underground Labyrinth had been eliminated, but the surface war was still ahead.