Chapter Summaries

Roy traveled with Waver, Rinice, Gris, and Imperial Concubine to a Welsh village to meet the head of the Atlas Institute, while Gris sought answers about her hometown. Roy entered the head’s cabin and met Cibach Alteim Atlasia Oberon, whose alchemy could manipulate phenomena and fate.

• Roy and his companions flew by helicopter to the Welsh mountains, where Waver explained that the head of the Atlas Institute lived near Gris’s village.
• Roy sent Waver, Rinice, and Gris ahead, telling Gris she would find the answer to her hometown’s secret, while he stayed behind with Imperial Concubine.
• Roy and Imperial Concubine walked through the countryside before he led her to a cabin beside a lake.
• Roy entered the cabin and met Cibach Alteim Atlasia Oberon, who identified Roy and Imperial Concubine by their titles and origins.
• The chapter described Cibach as the head of the Atlas Institute and explained that its alchemists manipulated phenomena and fate through extraordinary mental computation.

Roy met Atlas dean Cibach and received the Black Barrel, while Cibach revealed that parallel-world calculations marked Roy as humanity’s hope. Cibach asked Roy to resolve Logos.React’s runaway crisis after Waver and the others found its core, and explained the village’s role in King Arthur’s planned resurrection.

• Cibach revealed that his calculations could not predict Roy’s future and called him humanity’s awaited savior.
• Cibach introduced his adopted descendant Shion and asked Roy to let her join Chaldea once it was established.
• Shion gave Roy the Black Barrel, and Roy used an Atlas Institute Contract to legitimize taking the weapon.
• Cibach explained that Logos.React was turning Wales into a calculated false world and would eventually consume the Earth as Red Sand.
• Roy agreed to intervene after Waver and the others found Logos.React’s core, then asked Cibach about the village’s history.
• Cibach explained that Morgan had used Logos.React to prepare King Arthur’s resurrection and that Gris was the chosen body for the revived king.

Roy reunited with Olga Marie and helped her secure Shion’s place at Chaldea before entering Logos.React’s virtual world to rescue Waver and the others. He appeared as Logos.React unleashed a storm of Red Sand, leaving the confrontation unresolved.

• Olga Marie arrived with Trisha Fellows and Kirschtaria Wodime, reunited with Roy, and accepted Shion’s appointment under the Atlas Contract.
• Cibach asked Roy to resolve the crisis in Logos.React’s virtual world, and Roy entered it without needing Cibach to open the way.
• Waver exposed the world as a reenactment created by Logos.React, which abandoned its cycles and prepared to kill the trapped group.
• Logos.React’s King Arthur form shattered and revealed the Hermes Bird, while Waver left the fight to Gris and Kay.
• Roy appeared before Waver, Rinice, and Gris, but the Hermes Bird scattered a rain of world-eroding Red Sand.

Roy destroyed the Atlas Institute’s virtual world and neutralized Logos.React’s world-ending power. After returning to the real world, he proposed that Shion inherit Cibach’s position as the Thirteenth Ancestor of the Dead Apostles by using the Osiris Sand.

• Roy stopped Gris from using King Arthur’s holy spear, warned her that doing so would make Ad disappear, and destroyed the encroaching Osiris Sand with the Word Spirit “Pride.”
• Roy summoned the Golden Divine Right and split the virtual world in two, allowing him and the others to return to Cibach’s cabin.
• Outside the cabin, Rinice introduced herself to Olga Marie, and the two girls began bonding while Kirschtaria quietly chose to protect their new friendship.
• Roy gave Cibach the remaining crystal of Logos.React and reminded him of his duty as Luzki’s Apostle and the Thirteenth Ancestor.
• Roy suggested that Cibach implant the harmless Osiris Sand in Shion, and Cibach asked her to inherit his position as the Thirteenth Ancestor.

Roy met Gris in London, where she mourned learning that her mother had sacrificed herself to stop King Arthur’s resurrection. Matou Sakura reunited with her sister Tohsaka Rin, while Alice Kuonji asked Roy to spare Sakura from his influence.

• Roy found Gris watching Tohsaka Rin and learned that she had discovered how her mother died to prevent King Arthur from being resurrected through her.
• Roy comforted Gris and told her that he, too, had endured grief while growing up.
• Matou Sakura reunited with Tohsaka Rin, who explained that their parents had died and described her life in Fuyuki.
• Rin apologized for Sakura’s childhood suffering, and the sisters reconciled as they blamed their father for what had happened.
• Alice Kuonji approached Roy and offered to continue cooperating with him if he would spare Sakura.

Rinice, Tohsaka Rin, and Matou Sakura were implicated in the locked-room murder of Izuluma’s Golden Princess, prompting Waver to ask Roy for help. Roy agreed to accompany him to the Twin-Faced Tower, where Rinice faced mounting suspicion and Inorai said she could not defend her.

• Consort Yu told Roy she would get along peacefully with the people close to him, and Roy reassured her that Alteria was only a substitute.
• Waver asked Roy for help after Rinice, Tohsaka Rin, and Matou Sakura were accused of murdering the Golden Princess at the Twin-Faced Tower.
• Roy deduced that the girls had been framed and agreed to go to the Twin-Faced Tower with Waver and Consort Yu.
• At the Twin-Faced Tower, Rinice recalled that the Golden Princess had asked to join El-Melloi before being found dismembered in a locked room.
• Carina was found dead by the river, and evidence linking her death to Rinice’s armed maid strengthened the case against Rinice.
• Inorai told Rinice that she could find no grounds to defend her amid the evidence against her.

Roy demonstrated that his new Eternal Return could rewind time, saving Rinice and the others from the events at the Twin-Faced Tower. He explained that the experiment had succeeded in embedding the ability into the world's rules, giving him a safeguard for his future journey into the A Certain Magical Index World.

• Inorai accused Rinice, Tohsaka Rin, and Matou Sakura of murdering the Golden Princess, while Aoko Aozaki defended them without evidence.
• Roy arrived at the Twin-Faced Tower, and Rinice's head exploded after she looked at him.
• Roy declared the case solved, then time rewound and Rinice woke on the train with Roy, Waver, Tohsaka Rin, Matou Sakura, and Gris.
• Waver checked Kelsnic's pocket watch and realized that time had gone backward.
• Roy explained that Eternal Return was an improved version of Death Return, embedded in the world's rules through the Ark in his right hand.

Roy explained how he altered time to prevent the Golden Princess’s murder and revealed the political scheme that framed Rinice and the El-Melloi group. At the Twin-Faced Tower, Tiadra faced her childhood friend Maios, whose obsession with the Root drove him to demand the beauty she had lost.

• Rinice discovered that Roy had returned them seven days earlier and learned this was the third cycle, after Roy had rewound time to find a point where the murder could be prevented.
• Waver, Rinice, Tohsaka Rin, and Matou Sakura chose to hear Roy’s explanation instead of investigating for themselves.
• Roy explained that Maios Brisan Kleinels had become obsessed with Tiadra Balueretta Izuluma’s beauty as a path to the Root, while the Izuluma family used Touko Aozaki and disguised Carina as the Golden Princess to conceal Tiadra’s death.
• Rinice explained that the Izuluma family framed El-Melloi to pressure it into leaving the Aristocratic Faction, weakening its political rival whichever choice it made.
• Tiadra removed her veil for Maios, but he rejected her current beauty and demanded that she show him the Golden Princess’s former Root-like form as she backed away from him.

Roy saved Tia Dera from Miao, exposed the flaws in the Izuluma family's beauty ritual, and persuaded Tia Dera and Estella to join the Church. After returning to Waver and the others, he explained that he had the sisters stage Tia Dera's apparent death to preserve their memories and avoid dangerous discrepancies.

• Miao tried to kill Tia Dera with a ritual dagger, but Roy appeared and stopped him.
• Roy incapacitated Miao and revealed that he was the Holy Church's Supreme Pontiff, while Estella initially mistook him for Tia Dera's attacker.
• Roy explained how the Izuluma family used the stars and the concept of Venus to create the sisters' beauty, and warned that their father would use them as experimental subjects.
• Tia Dera and Estella accepted Roy's offer of protection and agreed to join the Church.
• Roy instructed the sisters to stage Tia Dera's death and alter Miao's memories so events would match the timeline Waver and the others remembered.
• Back near Windmill Station, Roy told Waver that preserving their memories would prevent dangerous doubts about altered timelines from affecting their future magecraft.

Roy’s Eternal Return spell restored Tia Dera and exposed Mayo and the Izuluma Family’s plot at the Twin-Faced Tower. After Mayo confessed and Roy killed him, the Golden and Silver Princesses stood before Roy at St. Paul’s Cathedral.

• Roy had Rinice reenact the Izuluma Family incident under Eternal Return, then appeared at the Twin-Faced Tower with the living Tia Dera.
• Touko Aozaki and Aoko Aozaki discussed how Tia Dera’s return involved both a Soul Prototype and time magic.
• At Roy’s request, Tia Dera confronted Mayo, who admitted he had killed her and demanded to know why she was alive.
• The head of the Izuluma Family confessed that he had framed El-Melloi and revealed that Touko had restored a false Golden Princess for the guests.
• Mayo defended his desire to kill Tia Dera for the Izuluma Family’s experiments, and Roy split him apart with magic.
• At St. Paul’s Cathedral, Consort Yu watched Roy while Tia Dera and Estella stood before him.

Roy took Tia Dera and Estella into the Holy Church and planned to complete their spell formula as a path to the Root. He then visited Anastasia, whose jealousy over Consort Yu left her crying and asking whether he no longer wanted her.

• Roy freed Tia Dera and Estella from the Clock Tower and told them he wanted to turn them into a Gate to the Root.
• Tia Dera and Estella agreed to give Roy everything in return for his help completing their pursuit of the Root.
• Roy learned that Waver had received an invitation to the Mage's Eye Collection Train and discussed him with Consort Yu.
• Roy encountered Illya, who teased Consort Yu and then fled when Roy threatened her with a Remote Control-like object.
• Roy visited Anastasia with Consort Yu following him, and Anastasia grew jealous and upset at their closeness.
• Roy teased Anastasia instead of comforting her, and she cried as she asked whether he no longer wanted her.

Roy confronted Kishinami Hakuno and Kama, agreed to settle their conflict within ten years, and learned that Waver and Olga Marie were in danger. He traveled to the Mage's Eye Collection Train, where Dr. Hartres and Faker faced the Seventh Ancestor, and revealed his overwhelming presence to them.

• Roy reassured Anastasia that he would never abandon her and urged her and Consort Yu to stop arguing and be honest with each other.
• Kishinami Hakuno told Roy she had advanced to the mature stage of the Beast, while Kama warned that they would soon force him to face them.
• Roy promised to prepare for a decisive war within ten years and learned from Kama that Waver and Olga Marie were in danger because of an experimental product he had created.
• Roy received Marisbury's letter and went to help at the Mage's Eye Collection Train, which had been diverted into the Seventh Ancestor Fuhai Lin. Anashu's territory.
• Dr. Hartres and his Servant Faker watched the forest react in terror as Roy arrived, and Hartres recognized him as the Supreme Pontiff.

Roy killed Hephaestion and exposed Hartres’s true purpose, then spared him and left him to seek his own kind of glory. After the train survivors recovered, Roy healed Calber and urged the aging executor to retire and care for children in a Church orphanage.

• Roy identified Hephaestion as Alexander’s unrecorded substitute, and she unleashed her Noble Phantasm before Roy destroyed her with a single gesture.
• Hartres revealed that he was Kuro Azuno, Roy’s former test subject, and admitted that his plan to create a god of magecraft had been a pretext for seeking a glorious death.
• Roy told Hartres that he had already completed his experiment on someone else, spared him, and challenged him to seek radiance alongside Waver.
• Waver and the others recovered beside the damaged train, while Gris confirmed that Ad had survived and Rinice discussed the need to form an alliance with Olga Marie.
• Roy found the wounded Calber, healed his injuries, sealed his Mystic Eyes, and urged him to retire to a Church orphanage and teach children.

Roy returned to his original world after more than a hundred days away and confronted the fear he felt about facing the Demon Gods. He crossed back into the A Certain Magical Index World, where he saw the distorted overlapping phases and began adjusting to its warped reality.

• Roy comforted Olga Marie as she grieved Teresa's death, then read Marisbury's letter about the successful sixth Demi-Servant embryo, Mash Kyrielight.
• Roy returned to his original world and found Athena absent as she focused on consolidating her Unique.
• Roy admitted to Aiwass that he feared the Demon Gods, but decided to return to the A Certain Magical Index World and cross the final abyss.
• Roy arrived in the A Certain Magical Index World and saw how overlapping phases distorted the world's laws, human thoughts, and fates.
• Roy adapted to the world's warped reality and found himself standing on a street in a peaceful city of red-walled, red-roofed buildings.

Roy arrived in Odense, learned about Egeskov Castle and the distorted magic of the world, then encountered the Demon God Othinus. Othinus revealed that she wanted to study the mysterious power in Roy’s right hand and warned him that he could not resist her.

• Roy spoke with a florist in Odense, learned that Academy City existed in the Far East, and decided to visit Egeskov Castle before choosing his next move.
• Roy studied how the world’s overlapping phases distorted magic and concluded that most modern magicians relied on Aleister’s simplified system.
• Roy met Aururs, who hurried toward a veterinary hospital with a dying kitten, and sensed that the man was dangerous.
• Othinus appeared behind Roy, introduced herself as a Demon God, and identified Aiwass and the mysterious power in Roy’s right hand.
• Othinus explained that her recently reclaimed power temporarily limited her possibilities, but insisted that Roy still could not defeat her.

Roy Crowley faced Othinus, whose Demon God power overwhelmed his Divine Right and let her forge the Lord of the Gods' Spear from the Black Barrel. After Othinus destroyed the universe and Roy returned through Eternal Return, he found her waiting for him in Odense and chose to face her directly.

• Roy Crowley attacked Othinus with Jacob's Ladder's Wrestling with God, but she crushed the Divine Right and explained that his right hand contained something she desired.
• Othinus took Roy's Black Barrel and used it to forge the Lord of the Gods' Spear, succeeding in her fifty-fifty gamble.
• Othinus swung the spear and destroyed the universe, seemingly erasing Roy and everything around him.
• Roy returned to Odense through Eternal Return and decided to leave Denmark rather than interfere with Othinus's ritual.
• Roy discovered Othinus had followed him to Odense with the Golden Spear and walked up to face her.

Roy and Othinus became trapped in an endless cycle of worlds being destroyed and reborn, each testing the limits of the other. Roy used the repetitions to absorb knowledge about the universe and study Othinus, and the chapter ended with her finally stopping after millions of cycles and recognizing that she could not overcome his spell formula.

• Othinus deduced that Roy’s right hand might be a key to a new world and admitted that she had discovered it by chance while pursuing Aururs.
• Othinus repeatedly destroyed the world, triggering Roy’s Eternal Return and trapping them together in a cycle neither could break.
• Roy endured millions of repetitions without losing his memories, absorbing knowledge from each world’s destruction and observing Othinus.
• Othinus finally stopped the cycle and entered the void with Roy, where he noticed her hand trembling around the Lord of the Gods’ Spear.
• Roy teased Othinus about how many times she had destroyed the world, and she realized she could not find a limit to his right hand or break his spell formula.

Roy endured Othinus's repeated attempts to break his will and challenged her to identify the happiness she wanted. When Othinus could not imagine a satisfying world of her own, Roy persuaded her to lend him part of her power so he could show her his ideal happiness; they began creating it in London in 1919.

• Roy questioned Othinus about her failed attempts to control or imprison him, then teased her about her fear of the empty universe.
• Othinus reshaped reality into worlds that tested Roy with humanity's hatred, power, betrayal, and indulgence, but Roy rejected them as the happiness he wanted.
• Othinus created a classroom from Roy's memories and learned that he remembered her worlds as real, while insisting they were not his desired happiness.
• Roy argued that Othinus could not find reality or happiness in worlds she created herself and asked her to describe her ideal world.
• Othinus realized she had forgotten what happiness she sought, then connected her consciousness to Roy's and lent him one-tenth of her Demon God Power.
• Roy and Othinus began constructing his world of happiness in a luxurious London apartment in 1919.

Roy used the world he created with Othinus to investigate the flaws of Demon Gods and concluded that their spirits remained limited despite their divine power. After hundreds of millions of cycles, he revealed the power behind his right hand and challenged Othinus with his strongest attack.

• Roy brought Othinus into his imagined Crowley family life, then discussed how Demon Gods lost anticipation and made worlds feel false.
• Roy argued that Demon Gods could add phases but could not truly subtract them, and declared that he sought to become a perfect One God at 9=2.
• Roy and Othinus resumed their battle, enduring hundreds of millions of destructive cycles until Roy realized that Demon Gods' spirits had limits.
• Roy concluded that Demon Gods possessed divine power without attaining the spiritual perfection of true gods, Buddhas, or immortals.
• Othinus taunted Roy for relying on a mutually destructive stalemate, but Roy revealed his Divine Right and invoked “Who Resembles God the Most?”

Roy defeated Othinus by destroying the Lord of the Gods' Spear and revealing how he had used Eternal Return to exploit her weakened power and endure countless cycles. As he prepared to restore the original world, Othinus reconsidered her wish to return home and realized she had truly longed for someone who could understand her.

• Roy revealed that he had learned how to destroy the Lord of the Gods' Spear and had willingly remained in the cycles to study Othinus and the Demon Gods.
• Roy explained how he could use Eternal Return to make Othinus's attacks fail and his own succeed, leaving her kneeling and emotionally shattered.
• Roy admitted he could not kill Othinus, then told her to seek her true happiness before preparing to restore the original world.
• Othinus asked why Roy would leave without taking revenge, and Roy explained that he accepted the risks of his own violent path and would respond to defeat by growing stronger.
• Othinus recalled how creating phases had erased her homeland and left her isolated, and she realized that returning home had been a means of escaping loneliness rather than her true goal.
• Othinus concluded that she had wanted someone who could understand her, but questioned whether anyone like that had ever existed in her original world.