Chapter Summaries

Hermione and the others discussed their research and strategy in this world, then identified a way to use causality to develop Arcane Spark and true Holy Spells. The group prepared to begin work, but a sudden visitor interrupted them.

• Pheobe told Hermione that her analysis of Crimson Demon DNA and Aqua's goddess blood was progressing rapidly, supporting Ian's Law Interference Theory.
• Hermione described how she, Lily, and Snape had struggled to understand the Adventurer Card, Divine Flame, and skill-upgrading potions.
• Hermione, Snape, Lily, and Pheobe agreed to avoid conquering the world and instead help Aqua defeat the Demon King, then use her to investigate the Heaven Realm.
• Hermione proposed that the world's level-up and skill-point systems were built on causality, and suggested creating an Arcane Spark to turn causal feedback into spellcasting power.
• Snape revealed that Aqua's purification ability had accelerated their progress toward the Seventh Tier, and Pheobe planned to collect more specimens and recruit Wiz.
• Someone knocked heavily on the laboratory door, interrupting the group's plans.

Kazuma’s party learned that the Mobile Fortress Destroyer was approaching Axel, so Kazuma asked the Arcane Squad to handle it. Filius disabled and captured the fortress, then was ordered back to help develop a weapon against the Demon King, while Pheobe continued trying to arrange a meeting between Wiz and Ian.

• Luna told Kazuma’s party that the Destroyer was heading for Axel, and Kazuma decided to find the Arcane Squad instead of confronting it himself.
• Pheobe called Filius back from his adventure and ordered him to defeat the Destroyer and bring it back intact.
• Filius pierced the fortress’s shield, shut down its self-destruct sequence, removed its Corona Stone, and teleported the Destroyer to the base warehouse.
• Filius received orders to return to work on a strategic weapon based on Megumin’s Explosion Magic and sighed over the end of his vacation.
• Wiz declined Pheobe’s marriage proposal but agreed to meet Ian before making a final decision.
• Pheobe left the shop planning to hunt an ancient dragon and then take Vanir’s mask to reach Hell.

Ian completed a major study of the Cosmic Will and considered using it to spread his variants across the multiverse. Mikoko sought his help finding her missing brother, and Ian discovered that her brother Yami was alive on the Western Continent, though he delayed taking her there until they finished other work.

• Ian finished his research on the Cosmic Will and ordered Morgana to archive it and destroy the papers.
• Ian confronted Mikoko, who knelt and swore a Blood Oath to ask for his help finding her younger brother.
• Mikoko showed Ian a portrait of her brother, whom Ian recognized as Yami Sukehiro.
• Ian traced Mikoko and Yami's bloodline and learned that Yami's memories of drifting to the Western Continent had been fabricated by God.
• Ian told Mikoko that Yami was alive on the Western Continent, declined her Blood Oath Crystal, and promised to take her there after they completed cleanup work.

Ian Bones sent a clone named Xiao Yueqiuman to protect Bones Advanced Magic Academy as a Level Seven Spirit Calamity devastated Kyoto. Beneath the academy, Ian obtained and fused the Spade Original Tome, claiming the puzzle’s third fragment.

• Ian Bones created a clone and named it Xiao Yueqiuman, then sent him away to carry out the plan.
• A colossal hand descended from black clouds, destroyed the Imperial Palace, devastated the Yin-Yang Protection Bureau, and failed to break Bones Advanced Magic Academy’s defenses.
• General Shinta healed himself and gathered survivors, while Mikoko persuaded many of them to seek safety at the academy instead of the Imperial Palace.
• Mikoko led the survivors through the corrosive mist to the academy, where Xiao Yueqiuman maintained a golden barrier and the headmaster asked them to contribute psychic power.
• Ian Bones used Substitute Talismans to open a sealed underground chamber and obtained the Spade Original Tome.
• Ian Bones fused the Spade Original Tome with his own Original Tome and claimed the third fragment.

After gaining partial control of the Cosmic Will, Ian discovered the seal holding a god would fail within twenty-three years and moved to confront Lucius in the Underworld. He defeated Lucius’s attacks but was interrupted by Dante, Zenon, and Morris, whom he declared he intended to capture for their powers and possessions.

• Ian merged the Spade Original Tome into his soul, gained authority over the Spirit Realm and partial control of the Cosmic Will, and learned the god’s outer seal would collapse within twenty-three years.
• Ian left Qiuman to rebuild order in the Eastern Continent, then traveled to the Underworld after one of his powerful avatars was destroyed.
• Ian found Lucius, who revealed that he had absorbed the powers of Astaroth, Beelzebub, and Lucifero and claimed Satan’s throne.
• Ian and Lucius fought with Time, Gravity, Space, and Anti-Magic, and Ian pinned Lucius with Anti-Magic arrows before trying to seal him.
• Dante, Zenon, and Morris arrived to protect Lucius, and Ian announced that he wanted two things belonging to him and intended to claim Morris as prey.

Ian defeated and contained the Dark Triad and Lucius, then entered the Underworld’s Eighth Layer and uncovered the truth about God and Satan’s ancient war. After concluding that God had engineered the conflict to pursue Transcendence, Ian collected Satan’s remains and the Diamond Kingdom Grimoire to create a powerful undead.

• Ian neutralized Dante, Zenon, Morris, and Lucius, then sealed them inside an Anti-Magic Domain while his Shikigami fought the mutated Demon army.
• Ian entered the Eighth Layer, found Satan’s remains, and learned that Morris had served God in exchange for forbidden knowledge.
• Ian extracted Astaroth’s memories and discovered that Satan had tried to strengthen God’s seal before dying, while God had concealed his true strength during the ancient war.
• Ian concluded that God had orchestrated the war to pursue Transcendence and raised his threat level ahead of the coming Elysium invasion.
• Ian collected Satan’s bones and retrieved the Diamond Kingdom Grimoire to make an ultimate undead.

Ian prepared for the coming assault on Elysium, strengthened his will by extracting it from alternate Astas, and redirected several research projects toward the final battle. He learned the war would begin in a few days and joined the Clover Kingdom’s gathered fighters.

• Ian fortified all six layers of the Underworld, controlled its mutated angel-demon creatures, and found Elysium’s defenses far more powerful than expected.
• Ian ordered Sally to grow a new body for Julius and learned that repairing the World Gate would take three to five years, so he redirected Clone No. 8 to repair the Planet-Destroyer Cannons.
• Ian used alternate Astas’ willpower to raise his own to the Seventh Scale, but the extraction damaged their souls and left them powerless; he ordered their healing and arranged for their loved ones and peaceful lives to be restored.
• Ian rejected Clone No. 7’s World-Stealing Project until after the battle, approved Clone No. 2’s life-sacrificing forbidden magic, and gave Lucius’s body to No. 2 to study karma.
• Ian gave Satan’s bones to Clone No. 6 and Sally for their ultimate undead project, then went to meet the Clover Kingdom’s captains and elite fighters as the assault on Elysium approached.

Ian sent the Royal Knights through a portal to invade Elysium, while Nero and Dorothy established support systems and relayed Nacht’s intelligence. The Knights overwhelmed the first and second floors, but Yuno faced four Seraph Lords on the third floor, twice the number Nacht had reported.

• Ian briefed the Royal Knights, promised to use Time Magic to restore them if they died, and sent them through the portal to Elysium.
• Nero sealed Elysium’s fourth floor against reinforcements, while Dorothy established secure dream communication and received Nacht’s report about the enemy defenses.
• Langris trapped most of the first-floor angels with Spatial Prison, resisted their mental attack, and defeated their fused giant form.
• On the second floor, Jack fought the angels using Arcane Runes after a golden magic circle disabled the Knights’ magic books.
• Yuno defeated the third-floor angels, but four Seraph Lords appeared where Nacht’s intelligence had predicted only two.

Yami assigned the expeditionary force to fight the four Seraph Lords while Ian prepared a coordinated ambush. After O Plan subdued the lords, the elves completed their ritual and Ian entered Elysium, where the war remained unresolved.

• Yami divided the fighters among the four Seraph Lords, and Yuno, Asta, Mereoleona, Fuegoleon, Noelle, Yashir, Vangeance, and Yami engaged their assigned opponents.
• The fighters struggled against the Seraph Lords' powerful abilities, while Noelle and Yashir discovered that True Magic let their physical attacks bypass Dispersal Magic.
• Ian confirmed that the expeditionary force was holding its ground and ordered Dorothy to signal the front line when the elves' summoning ritual neared completion.
• The Fifth Tier Magic Knights used Apparition to strike the Seraph Lords from behind, and Asta sealed the wounded lords' mana with Anti-Magic Cuffs.
• Charmy fed the exhausted fighters, Vanessa confirmed that everyone had survived, and Yuno stayed alert as the elves completed their ritual.
• Ian entered the realm of the gods through the arcane pillar of light.

Ian Bones confronted Eve in Elysium’s Fourth Tier and learned that she had manipulated his curiosity to draw him there. Eve revealed her plan to escape the universe by consuming Ian’s soul, and the two prepared to fight.

• Ian Bones entered Elysium’s Fourth Tier and found Eve waiting beside a pool and throne.
• Eve admitted she had planted a psychological suggestion in Ian, amplifying his thirst for knowledge to guide him to her.
• Eve explained how she and Adam had provoked a crisis that forced the Cosmic Will to create Alan and the Original Grimoire, before Alan and Adam joined forces to seal her in Elysium.
• Ian deduced that Eve had taken part of the Original’s Authority, while Eve confirmed only part of his theory and refused to reveal her full plan.
• Eve declared that she needed to consume Ian’s soul and memories to achieve Transcendence, and Ian drew his staff as they prepared to fight.

Ian uncovered Eve’s plan to use the Original Grimoire and his Underworld authority to break her seal, then fought her across parallel timelines after she escaped. Their battle left worlds devastated, and Eve reappeared after Ian seemingly erased her before launching a colossal water giant at him.

• Eve’s seal began breaking, but Ian recognized her attempt to steal his authority, removed her mental suggestion from his soul, and blasted through Elysium’s fourth layer with Volcanic Doomsday.
• Eve destroyed the remaining layers of Elysium with Destruction Sphere, while the Magic Knights escaped under Ian’s protection; she revealed the Clown Grimoire and used Ian’s own spells against him.
• Ian summoned a meteor, but Eve cubified it, then drew him into a parallel timeline where they exchanged attacks that devastated the world.
• Ian erased Eve with the Sword of Time Erasure, but she revived through Fate Reversal Magic and fled to another parallel timeline.
• Ian realized Eve was draining mana from parallel worlds to fuel her magic, but she summoned the Sea-Covering Titan from the planet’s oceans and attacked him.

Ian fought Eve and her millions of parallel incarnations, ultimately unleashing Void Annihilation Energy to erase them and escape with the original Eve. After recovering, he returned to the Arcane Empire with Eve as a captive and intended experimental subject.

• Ian froze the Sea-Covering Titan, trapped Eve with the Pillars of Heavenly Prison, and attacked her with accelerated pebbles and Conceptual Magic: True Death, but she repeatedly revived.
• Eve revealed that she had united millions of Seventh-Tier selves across parallel timelines, and Ian battled them with the Doom of the End of Elements, Satan, and Seventh-Tier Planet-Destroyer Cannons.
• As his magic ran low, Ian seized the main Eve and crushed five spheres of Void Annihilation Energy, erasing the Eve incarnations and triggering a deadly void nebula that pursued them across universes.
• Ian escaped the nebula after jumping through more than a hundred parallel timelines, confirmed his base was safe, and recovered in a secluded dimension.
• Ian returned to the Arcane Empire with Eve captive, intending to use her as an experimental subject.

After returning from Elysium, Ian Bones told the Magic Knights that he planned to fuse their world with the universe of the Arcane Empire and explained what that change would mean. He began preparing the kingdoms and peoples for the transition, then publicly resigned as Magic Emperor to announce the coming of a new world.

• Ian Bones returned safely, learned that Clone One had restored Elysium and studied its angel-making pool, and entrusted Eve to the clone.
• Ian told the assembled Magic Knights about the Arcane Empire and his plan to move their entire world into his universe, promising open opportunities and a path to advancement for its people.
• Ian revealed that he would resign as Magic Emperor and invited Yuno and the others to aspire to the Arcane Emperor's throne.
• Ian told Yami Sukehiro that his older sister was alive in the Land of the Sun, and Yami resolved to stop avoiding Charlotte's feelings.
• Ian explained the new imperial government to Lolopechka and reassured the Elves and Dwarves about their place in the Empire.
• The next morning, Ian announced his resignation as Magic Emperor in a magical projection over the Clover Kingdom.

Ian completed his preparations to separate the Black Clover World from the multiverse, then used Void Energy and the Original Grimoire to seal it in a crystal ball. He left through the repaired World Gate for KonoSuba, determined to seek harsher trials and grow stronger.

• Ian secretly worked on the World-Stealing Project, and Merlin appeared after Ian summoned him across worlds.
• Merlin repaired the flawed Void-severing spell and warned Ian that he had missed a chance to reach the Eighth Scale by avoiding a direct battle with Eve.
• Ian noticed Merlin seemed unusually hurried and weakened, then resolved to seek dangerous worlds and face life-or-death battles.
• Over five years, Ian developed a Soul Sea and an Arcane Heart, improved his Void Energy knowledge, and prepared Floating City 3.0, while shelving Causality Empowerment research.
• Ian bid farewell to his allies and confirmed that his Eastern Continent clone had prepared the region for the Great Merge of Worlds.
• Ian severed and sealed the Black Clover World inside a crystal ball, reassured its leaders, and entered the World Gate bound for KonoSuba.

Ian used the new Void Core Engine to reach the KonoSuba universe, reunited with Pheobe, Hermione, and Lily, and learned that the gods controlled many other-world dimensions. After Hermione revealed she could not reproduce the higher-tier leveling systems, Ian identified the missing Causality Authority and proposed using captured demons and angels as servers; Pheobe then said she had found the final piece for the Dragon God Project.

• Ian stored the Black Clover world, used the Void Core Engine, and arrived in the KonoSuba universe after a three-day journey.
• Ian reunited with Pheobe, discovered she had reached the Seventh Tier, and found Hermione and Lily exhausted from intense research.
• Pheobe explained that Filius had defeated the local Demon King and visited other dimensions controlled by the gods, prompting Ian to infer how the universe's other worlds were organized.
• Hermione showed Ian her replicated KonoSuba system and explained that it could not exceed the Third Tier, unlike systems in other dimensions.
• Ian identified Causality Authority as the missing component and proposed using captured demons and angels to stabilize Hermione's pocket dimension as its servers.
• Pheobe suggested forging a Divine Artifact to carry the Authority, and Hermione began designing a Causality Staff before Pheobe announced she had found the final piece for the Dragon God Project.

Ian reviewed Pheobe’s New Generation Fire Dragon King research and identified the need for an independent reincarnation system, then helped Lily resolve a major obstacle in her Arcane Spark research. After reconciling with Lily and leaving her to test his new design, Ian went to visit Wiz.

• Pheobe showed Ian her New Generation Fire Dragon King, and Ian pointed out its missing Dragonkind memory link and reincarnation mechanism before proposing an internal reincarnation system.
• Pheobe teased Ian about Wiz and his past relationships, and Ian admitted that one relationship he had cared about had ended in rejection.
• Ian learned that Lily’s emotional breakdown came from guilt over James, and Lily said she planned to resolve her relationship with James and Severus through couples therapy.
• Ian apologized to Lily for manipulating events around James, and they reconciled before she presented her Arcane Spark research and its risks from faith corruption.
• Lily explained that her experiments could not reproduce the gods’ tier-crossing Causality Empowerment, and Ian proposed using the Arcane Spark to synchronize an Arcanist’s soul frequency with otherworldly gods or Demons.
• Ian gave Lily his Black Clover angel and Demon soul research, then left the laboratory and went to see Wiz.

Ian cleared up Visha’s doubts about his existence, invited her on a date, and took her to modern Earth, where she revisited the world Kazuma had left behind. During dinner, Ian began telling Visha about his first life and the woman who rekindled his love of knowledge, leaving her asking whether he missed that woman after reincarnating.

• Visha met Ian in her magic item shop and accepted his invitation to go on a date.
• Ian took Visha through a portal to modern Earth, explained how Aqua, Kazuma, Megumin, and Darkness stayed in contact, and revealed that his forces controlled Heaven and Hell.
• Ian guided Visha around Earth, extending the daylight with the Law of Time before they shared dinner at a skyscraper restaurant.
• Visha asked Ian what first fueled his pursuit of magic and knowledge, and Ian described his childhood curiosity, high-school bullying, and unhappy attempt to fit in.
• Ian told Visha that a woman in college accepted his eccentric interests and helped restore his happiness, and Visha asked whether he missed her after he died and reincarnated.

Ian told Visha how his first life ended, how grief and his pursuit of resurrection led him to found the Arcane Empire, and Visha recounted her own path to becoming a lich. After three months of traveling together, Ian offered her a way to reshape her soul into a dual force of death and holy magic, and Visha agreed to the procedure.

• Ian told Visha that he had ended his first relationship because of class differences, then died and reincarnated into a magical world.
• Ian explained that his parents died in a war, driving him toward despair and forbidden experiments before he eventually resurrected them and founded the Arcane Empire.
• Visha recounted how she became the Ice Witch, transformed into a lich to save her companions, and made a pact with the Demon King to protect civilians.
• Ian and Visha traveled through countless worlds for three months, growing closer as they discussed magic, the universe, and civilizations.
• Ian showed Visha a clone that could restore her human body, but she said she had accepted being a lich, so he proposed reshaping her soul to wield both death and holy magic.
• Visha trusted Ian's assurances about the procedure's safety and agreed to begin the soul transformation.

Ian transformed Visha into a being who wielded both holy and death powers, then tested his Arcane Spark and devised restrictions to prevent its misuse. After extensively plundering the KonoSuba universe and parallel worlds, he traveled through the Void Gate and returned to the Arcane Empire.

• Ian used a serum made from a god and Satan to alter Visha's body and soul, giving her both holy purification and undead powers.
• Visha tested her new abilities, and Ian opened the Empire's advanced magical knowledge to her after she stabilized.
• Ian created an Arcane Spark and tested its destructive spells, discovering that Negative Causality amplified them more than Positive Karma.
• Ian planned restricted and complete versions of the Arcane Spark, with strict contracts and reviews to prevent massacres and forced worship for power.
• Ian looted dimensions and Earth in the KonoSuba universe, then raided populations across parallel worlds until the universe's origin will expelled him.
• Ian stored the Floating City, traveled through the Void Gate, and arrived at the Arcane Empire's Cosmic Crystal Wall.

As the Undead Calamity devastated the Milky Way, Naga Queen Aquafina evacuated her people from Blue Sea Star and decided to surrender the Naga Tribe to the Arcane Empire. After she sent the declaration, an Arcane Empire expeditionary fleet arrived at Azure King Star.

• Aquafina led the Naga forces in a costly battle against the undead on Blue Sea Star, then ordered civilians evacuated aboard interstellar Arks.
• Aquafina refused to destroy Blue Sea Star and brought the fleet to Azure King Star, where she learned the Naga Tribe had exhausted its strategic supplies and funds.
• Aquafina rejected a minister’s proposal to make the Naga Tribe a wandering civilization and ordered a declaration of surrender to the Arcane Empire.
• Aquafina sent the surrender declaration through the Universal Web despite fearing that her people would have to serve alongside undead in the Empire.
• An Arcane Empire expeditionary fleet arrived outside Azure King Star, and Aquafina went with her ministers to welcome its leader.