Chapter Summaries

Leon joined the Holy Grail War in Emiya Kiritsugu’s place in exchange for fulfilling Kiritsugu’s wish, while Eri tried out Artoria’s Excalibur. Leon warned Kiritsugu and Artoria that the Grail would disappoint them, then opened a portal to take the group to Fuyuki City.

• Eri swung a magically forged copy of Excalibur in the snowy forest while Illyasviel cheered her on and Artoria watched in amazement.
• Artoria questioned Leon about his power and why he was entering the Holy Grail War, and he explained that he had traded places with Emiya Kiritsugu.
• Kiritsugu revealed that he wished for world peace, and Leon confirmed that he had agreed to fulfill that wish.
• Leon warned Kiritsugu and Artoria that their expectations of the Holy Grail would bring disappointment.
• Leon called Eri over, opened a Mystic Arts Portal, and led the group toward Fuyuki City.

Leon brought Emiya Kiritsugu, Irisviel, Artoria, and the others to Fuyuki, where he extracted Irisviel’s Lesser Holy Grail and activated it. He opened a passage to The Root and invited Artoria and Emiya Kiritsugu to make their wishes, warning them that the corrupted Grail would twist them through human evil.

• Leon brought the group through a portal to a temple overlooking Fuyuki, where Eri and Illya excitedly photographed the city.
• Leon revealed that Irisviel was the Lesser Holy Grail, and Irisviel explained her role and the Einzbern Family’s mission to Emiya Kiritsugu.
• Leon activated the Holy Grail system and created tiny Artorias, whose souls entered the Grail and opened a passage to The Root.
• Masters across Fuyuki rushed toward the temple after seeing the passage appear before the Holy Grail War had begun.
• Leon invited Artoria and Emiya Kiritsugu to make their wishes, warned them that the Grail was corrupted, and watched as they approached it.

Eri used her giant form and Moon Goddess Purification Beam to cleanse All the World's Evil from the Greater Holy Grail, while Leon explained the Grail’s limits and its connection to The Root. As the purification ended, the Masters and Heroic Spirits converged on Ryuudou Temple, bringing the Holy Grail War close to starting early.

• Eri transformed into a giant and fired a Full Moon Wave at the hole above Fuyuki City, but it did not stop All the World's Evil.
• Eri used the Moon Goddess Purification Beam to separate the Black Mud from the Greater Holy Grail and clear the sky.
• Emiya Kiritsugu and Artoria awoke after being expelled from the Holy Grail, devastated by the answers it had given them.
• Leon told Artoria and Emiya Kiritsugu that the corrupted Grail had distorted their wishes, explained how it could reach The Root, and said it might not fulfill every wish.
• Eri finished purifying the Greater Holy Grail, and Gilgamesh, the King of Conquerors, Hundred-Faced Hassan, Lancelot, and Zouken Matou arrived at the temple.

Leon’s Kill Intent Rebound wiped out the hostile Servants and Zouken Matou, leaving the survivors to make their wishes on the Holy Grail. Leon entered The Root and began absorbing its knowledge, then returned his attention to Eri and told her to make her wish.

• Leon’s Kill Intent Rebound killed Gilgamesh, Iskandar, Lancelot, Hundred-Faced Hassan, and Zouken Matou after they became angry.
• Eri confirmed that the Holy Grail War was won, and Emiya Kiritsugu wished for his wife and daughter to return to normal human beings.
• Artoria wished to return to the moment she drew the sword from the stone and find a more suitable king, and the Holy Grail sent her away to fulfill it.
• Eri let Leon go first, and he entered The Root after receiving a welcoming message from the Counter Forces.
• Leon studied the information within The Root through an M-Body, then told Eri to make her wish.

Eri used the Holy Grail’s remaining energy to help Saber fulfill her wish and was transported with Leon to the day Artoria drew the Sword in the Stone. Eri became the new King Arthur, while Artoria pledged loyalty to her.

• Eri wished for the Holy Grail to help Saber, and its magic carried her and Leon to the past after Leon said goodbye to the Emiya family.
• Artoria returned to the day she drew the Sword in the Stone and waited for the king she believed the Holy Grail would choose.
• Leon and Eri appeared above the Sword in the Stone, and Eri drew it as the gathered knights watched.
• The knights objected to a woman becoming king, but Leon’s power swiftly silenced them when their insults turned toward him.
• Artoria knelt before Eri and swore loyalty to her as King Arthur.

Eri became King Arthur and united Britain before leading its people into Eternal Avalon, where Leon later ended the Incineration of Human Order and sent Eri and Artoria to help Chaldea resolve the Lostbelts. After Leon emerged from seclusion, he invited Eri to find a food world, and Artoria eagerly joined them.

• Eri accepted Artoria's oath of fealty, named her chief knight, and unleashed both Oath Swords as the legend of King Arthur Eri began.
• Artoria led Eri's armies to unite Britain, defeat the Saxons and Vortigern, and establish the Knights of the Round Table; Leon kept the realm fed and later opened Eternal Avalon for its people.
• Leon explained that Avalon was not a Singularity, separated the Singularities from proper human history, killed Goetia, and sent Ritsuka Fujimaru and Mash back to Chaldea.
• When Chaldea later asked for help with the Lostbelts and the Alien God, Leon sent Eri and Artoria to join the expedition.
• After more than ten years, Leon emerged from seclusion and invited Eri to find a food world, while Artoria hurried over to ask about the food.

In the Gourmet World, Leon upgraded Eri’s cells with safer Gourmet Cells and decided to seek out talented chefs to prepare the best ingredients. The group traveled to the Food Wars! world and had Erina Nakiri cook for them as a potential private chef.

• Eri and Leon ate in a giant cornfield until Artoria returned with an enormous fathead fish, which Leon cooked for them.
• Leon explained that he had developed Gourmet Cells that strengthened the body without risking demonic backlash, then modified Eri’s cells.
• Leon chose to try famous Gourmet Hunters’ menus and said they needed a skilled chef to bring out the ingredients’ best flavors.
• Leon, Eri, and Artoria arrived in the Food Wars! world and asked Erina Nakiri to prepare a giant tuna as a test for a private-chef position.

Leon recruited Erina Nakiri, Liu Mao-xing, Little Fu Gui, and Master Hong, then led the chefs on a journey through increasingly powerful ingredients that transformed them into planetary-level fighters. After traveling through many worlds with Eri and Artoria, Leon sent them home and returned to the Resident Evil universe, where world-merging was underway and his true body awaited.

• Leon tasted Erina Nakiri's tuna, hired her, and recruited Liu Mao-xing after sampling his cooking.
• Leon brought Little Fu Gui and Master Hong back to the Toriko World, gave the chefs Gourmet Cells, and led them through feasts that made them planetary-level powerhouses.
• Leon and the chefs traveled through space and prepared a 108-dish feast from the Space Taipan after Leon defeated it using Universe Birth in a Thought.
• Leon said goodbye to the chefs and continued traveling through more than a hundred worlds with Eri and Artoria.
• Leon explored Little Garden, then sent Eri and Artoria back to their worlds and returned to the Resident Evil universe.

Leon turned the approaching Three-Body Universe into a Parallel World, but its civilizations altered the laws of physics to hide from a suspected invasion. As Leon repaired the collapsing universe, a Great God Civilization ambushed him near the Rosette Nebula with a trap that threatened to flatten the region into two dimensions.

• Leon redirected the Three-Body Universe into an orbit around the Resident Evil Universe and began turning it into a Parallel World.
• Decades later, Leon discovered that the Three-Body Universe's physical rules had changed and saw stars, planets, and black holes collapsing as a result.
• Leon used a four-dimensional fragment to learn that the Zeroers Civilization and other Great God Civilizations had disrupted the Cosmic Rules to evade a suspected interuniversal threat.
• Leon entered the Three-Body Universe and restored the damaged physical laws as he raced across it.
• A Great God Civilization ambushed Leon near the Rosette Nebula, slowing light and changing gravity while the region began collapsing into two dimensions.

Several Great God Civilizations attacked Leon with a Dimensionality Reduction Strike and other weapons, but he restored the universe’s rules and killed their leaders. He declared that the Three-Body Universe would become a Parallel World, then left, planning to send Tony and Banner to experience the real Three-Body world.

• Several Great God Civilizations, including the Zeroers Civilization, attacked Leon with rewritten laws, time manipulation, and dimensional reduction.
• Leon traced shapes in the Void, restored the collapsing space and altered physical rules, and nullified the civilizations’ attacks.
• The Great God Civilizations failed to understand Leon’s power, and he killed nearly all their highest-level leaders by looking toward their observation instruments.
• Leon restored order across the universe and announced that the Three-Body Universe was destined to become a Parallel World.
• Leon considered intervening in Earth’s Wallfacer era but decided against it, then opened a passage to leave the universe.
• Leon thought of sending Tony and Banner to experience the real Three-Body world and study its technologies.

Leon continued merging universes into a vast world cluster while studying the shared rules between them. After a century of genetic research, he fused the Doomsday Gene, surpassed 60,000 times his original genetic level, and began evolving toward Silver Superman.

• Leon merged more than a hundred universes into Parallel Worlds surrounding the Resident Evil Universe and studied how their rules connected.
• Leon halted his attempt to make the world cluster generate infinite Parallel Worlds because he lacked sufficient understanding of the rules.
• After nearly a century of research, Leon successfully fused the Doomsday Gene and grew to a height of 90 million kilometers.
• Leon’s genetic level surpassed 60,000 times its original level, and he awakened powerful psychokinesis as his body developed the abilities he desired.
• Leon realized he was evolving toward Silver Superman and fell asleep while basking in the light of a blue giant star.

After more than thirty years absorbing sunlight inside a blue giant, Leon emerged with strength far beyond the Super-Entity level and estimated his power at roughly one hundred-millionth of the Marvel Cinematic Multiverse. He considered whether his transformed state made him a Golden Superman, while Tony called from the Three-Body Universe to say he had cleared it and wanted to return.

• Tony called Leon from the Three-Body Universe, saying he had cleared it and asking Leon to take him back.
• Leon left the blue giant after more than thirty years of absorbing sunlight and assessed his vastly increased strength.
• Leon calculated that his raw power was roughly one hundred-millionth of the Marvel Cinematic Multiverse, enough to contend with many of its powerful beings.
• Leon compared his transformation to Golden Superman and considered how that state ranked among powerful versions of Superman.

After reaching a new stage of power, Leon traveled to the Three-Body Universe to retrieve Tony. He found Earth’s civilization protected by a Black Domain and reunited with Tony, who had helped develop the technology behind it.

• Leon realized that he had not yet reached Golden Superman’s full potential and began evolving his genes toward ninety thousandfold.
• Leon entered the Three-Body Universe and found Earth surrounded by advanced ships and robots, with warp ships forming a Black Domain around the Solar System.
• Tony used a Sophon to greet Leon, revealing that he had mastered the technology and helped Earth find a defense against the Dark Forest Law.
• Leon appeared in Tony’s command room, startling the armed researchers and security personnel until Tony introduced him as his younger brother.
• Tony realized Leon was nearly Golden Superman, complained that he had not caught up, and prepared to show Leon how he had completed his mission to save Earth.

Leon interrupted Tony at the United Nations Planetary Defense Council, healed the injured researchers, and took Tony back from the Three-Body World. At a farewell dinner, Tony recounted how he had defeated the Trisolarans and explained that Earth had chosen to broadcast harmless signals rather than isolate itself.

• Leon used Kill Intent Rebound to explain how the researchers had been injured, then healed them and told Tony about the Great God Civilizations and the Zeroers Civilization.
• Tony abandoned his planned speech to the Planetary Defense Council, and he and Leon left the Three-Body World after Tony said goodbye to Luo Ji, Shi Qiang, and Wade.
• Tony recounted how he became the fifth Wallfacer, used JARVIS to break the Sophon blockade, and helped Earth develop its own Sophons, Droplets, and Warp Drive.
• Tony said Earth used its technological advantage to destroy the Trisolaran fleet and its star system before the Trisolarans could broadcast Earth's location.
• Tony described Earth's vote to either create a Black Domain or leave its star system, and said Earth chose to broadcast harmless signals despite his disagreement.

Tony and Leon returned to Los Angeles at the instant they had left, where Leon reunited with two-and-a-half-year-old Morgan and teased Tony about her affection. Three years later, Leon faced increasingly frequent World Collisions across the Multiverse, whose hidden cause remained unknown despite clues pointing to Doctor Strange.

• Tony warned Leon to return them to the exact moment they had left, and Leon brought them back to their Los Angeles seaside home.
• Leon carried the sleeping Tony upstairs and reunited with Morgan, who told him she loved him five thousand times after he coached her.
• Leon took Morgan to get cloud ice cream, then bragged to Tony about what she had said before leaving Los Angeles.
• Over the next three years, World Collisions became increasingly frequent across universes guarded by M-Bodies.
• Leon traced clues to Doctor Strange, Stephen Strange, but World Collisions continued even in universes where Leon had subdued him.

Leon considered the growing Multiverse collision crisis and worried that the Beyonders might be behind it, while preparing the Divine Kingdom Dimension as a fallback. He arrived at Kamar-Taj, where Dark Doctor Strange had begun leading sorcerers into Hell to weaken demon lords and seize their dimensions.

• Leon consulted Eternity, who admitted he did not know who was behind the Multiverse crisis and suggested sending M-Bodies into neighboring Multiverses.
• Leon reflected that collisions were spreading across thousands of universes and considered the Beyonders a possible cause, though he believed he could flee with the Divine Kingdom Dimension if necessary.
• Leon traveled to Kamar-Taj and found everyone in an interstitial space Dark Doctor Strange had created inside its Small World.
• Dark Doctor Strange opened passages into demon dimensions so he and Kamar-Taj's sorcerers could fight their inhabitants, weaken demon lords' control, and help Leon claim the dimensions.
• Old Wang and Mordo accepted Dark Doctor Strange's approach after the sorcerers began using slain Hell demons to pay the cost of their spells.

Leon entered Hell and saw Kamar-Taj’s mages and the Men in Black using Contribution Points to fight Mephisto’s demons while Dark Doctor Strange and Infinite JARVIS battled Mephisto. As Mephisto prepared to ask the other Lords of Hell for help, Leon arrived, and Mephisto realized the Sorcerer Supreme had orchestrated the invasion.

• Leon entered the pocket space between Small Worlds and saw injured mages resting before returning to battle with Healing Factor.
• Leon passed through the portal and saw hundreds of mages fighting Hell’s demons while Hulk, Diana, Kara, and others fought stronger enemies deeper inside.
• Dark Doctor Strange and Infinite JARVIS battled Mephisto in the void at Hell’s core, while Mephisto struggled to retain control of Hell and had already been killed seven times.
• Mephisto decided to ask the other Lords of Hell for help rather than lose his Authority.
• Leon flew into the battle and greeted Mephisto, who recognized the Sorcerer Supreme and realized he had sent the invaders.

Leon confronted Mephisto in Hell, rejected his offer to target other demons, and declared that he wanted every Dimension Lord’s dimension. Mephisto fled through a spatial passage, leaving Leon’s pursuit unresolved.

• Mephisto threatened to expose Leon to Vishanti, then tried to persuade him to attack Satannish and Dormammu instead of Hell.
• Leon clarified that he wanted the dimensions belonging to Mephisto, Satannish, Marduk, and the other Dimension Lords.
• Mephisto realized Leon intended to take them all and opened a spatial passage to flee.

Leon enslaved Mephisto and ordered him to help conquer the dimensions of other demon gods. After returning from the Split Domain, Leon was reunited with JARVIS, Diana, Kara, and Wanda, who dragged him through a portal to the Moon.

• Leon used the Enslavement Secret Art to enslave Mephisto and ordered him to join forces with the other demon gods to seize their dimensions for Leon.
• Leon told Mephisto to rebuild his army and take only the souls of evil people, then sent Dark Strange and the sorcerers back to Earth.
• Leon spoke with JARVIS, who welcomed him home and explained that Tony had been worried about his long absence.
• Diana and Kara rushed to Leon, while Wanda opened a Mystic Arts Portal and the three women pushed him through to the Moon.
• Wanda transformed the lunar surface into a sea of cherry blossoms with Chaos Magic, and Kara announced that they were robbing Leon of his virtue.

Leon investigated World Collisions across thousands of universes, finding that Doctor Strange’s Memory Spell had disturbed many timelines but suspecting another cause remained. Back home, he learned that Odin had invited him and the others to his funeral.

• Leon visited a universe where Doctor Strange caused a collision and separated the two worlds.
• Leon stabilized a collapsing universe by making Peter Parker its new Anchor Being, then investigated its unexplained collision with Party Thor’s world.
• Leon examined thousands of universes and traced many World Collisions to the Main Universe Doctor Strange’s Memory Spell, though he suspected he had missed something.
• Leon returned home and found Diana and the others dressed formally for an invitation from Asgard.
• Leon read Odin’s invitation and discovered it was for his funeral.