Chapter Summaries

Rimuru crash-landed on Earth in Marvel’s New Mexico desert and discovered he had become a slime with few active abilities. S.H.I.E.L.D. found him and prepared to take him in for study, unaware that he was about to awaken.

• Rimuru learned that he had died, become Demon Lord Rimuru Tempest, and been sent to Marvel before the system dropped him onto Earth.
• Rimuru landed in a New Mexico desert crater, found that his body had basic slime abilities, and received the Great Sage skill from the system.
• Rimuru passed out as Great Sage loaded unfamiliar knowledge into his mind.
• Nick Fury sent Phil Coulson and a S.H.I.E.L.D. team to investigate the unidentified object that had fallen from the sky.
• Coulson’s agents found Rimuru asleep in the crater and failed to cut a sample from his indestructible body.
• Coulson ordered the team to seal Rimuru up and bring him back to base intact.

Rimuru awoke in a S.H.I.E.L.D. laboratory, where Nick Fury and the scientists discovered that the seemingly ordinary blue slime was a living creature with an unusual energy source. He vanished through a yellow portal, while the Ancient One realized that his awakening had thrown the future timeline into chaos.

• Nick Fury questioned Coulson about the blue slime recovered from the crater and examined it after the laboratory staff failed to damage it.
• The slime’s energy readings surged, and Rimuru awakened as a pair of golden eyes formed on its surface.
• Rimuru recognized Nick Fury and Coulson, then fell through a yellow hole that opened beneath him and disappeared.
• Nick Fury sealed the laboratory and ordered the agents to secure the surveillance footage, but they found no trace of Rimuru.
• The Ancient One realized too late that Rimuru’s surging energy had disrupted the future timeline and that the Eye of Agamotto no longer worked.
• Rimuru panicked over the power radiating from him and feared it made him look like a villain.

Rimuru persuaded the Ancient One to let him study magic at Kamar-Taj, where Mordo became his guide. After mastering the magical knowledge in a few months and repeatedly damaging the sanctum with his experiments, Rimuru was sent away with a stolen Sling Ring.

• Rimuru explained his origins to the Ancient One, who decided to keep him at Kamar-Taj and allow him to study magic.
• The Ancient One assigned Mordo to guide Rimuru through his initial lessons and arranged a place for him in the apprentice quarters.
• Over the next two or three months, Rimuru used Great Sage's learning speed to master Kamar-Taj's magical knowledge.
• The Ancient One decided Rimuru had to leave after his experiments repeatedly damaged the sanctum.
• Rimuru grumbled that the Ancient One would not lend him the Eye of Agamotto and revealed that he had stolen a Sling Ring.

After finding Tony Stark in the Afghan cave, Rimuru revealed that he knew Tony and Yinsen were secretly building armor. The chapter left them rushing to finish the armor, with Rimuru quietly helping through Great Sage.

• Rimuru learned from a Times Square missing-person notice that Tony was still captive, then spent two weeks searching for the cave.
• Rimuru entered the cave in disguise and overheard terrorists pressuring Tony to finish a missile.
• Rimuru revealed himself to Tony and Yinsen, startling them as they prepared to build their armor.
• Rimuru told Tony he knew they were making armor rather than a missile, easing the tension between them.
• Tony programmed the armor while Yinsen prepared parts, and Rimuru used Great Sage to help with the work.

Rimuru, Tony Stark, and Yinsen escaped the terrorists’ cave after Tony used the Mark I armor to fight his way out. Rimuru revealed his combat abilities, and Tony was blasted out of the canyon after destroying the weapons.

• Tony introduced himself to Rimuru, and Rimuru corrected him for calling him a girl.
• Tony put on the Mark I armor and fought the terrorists as Rimuru and Yinsen followed him toward the cave entrance.
• Tony’s armor became stuck in the rock, and a terrorist leader’s grenade damaged the cave entrance and the armor.
• Tony attacked the terrorists outside with the armor’s flamethrower, but machine-gun fire wrecked its leg drive.
• Rimuru used Great Sage to absorb incoming bullets and shoot down the remaining terrorists.
• Tony set off the weapons, and the resulting blast hurled him out of the canyon in a heap of broken armor.

Tony returned to New York with Rimuru and Yinsen after escaping the terrorists, and Pepper welcomed them before Tony called a press conference. At the venue, Rimuru spotted Phil Coulson and decided to avoid drawing his attention.

• Rhodey arrived by helicopter and agreed to take Tony, Yinsen, and Rimuru back to New York.
• Pepper greeted Tony at the airport, thanked Yinsen for saving him, and welcomed Rimuru.
• Tony refused Pepper's demand to go to the hospital and ordered her to arrange a press conference.
• Obadiah learned Tony had returned, angrily condemned the Ten Rings, and went to meet him.
• Rimuru attended Tony's press conference, noticed Phil Coulson in the crowd, and chose to keep out of his way.

After Tony announced the closure of Stark Industries' weapons division, Rimuru helped replace Tony's Arc Reactor and revealed that he came from another universe. Rimuru and Tony began a business partnership, while Nick Fury ordered S.H.I.E.L.D. to investigate Rimuru and create a plausible background for him.

• Tony announced that Stark Industries would shut down its weapons division, causing the company's stock to plunge and Rimuru to see a chance to invest.
• Tony asked Rimuru to remove the wire from his chest, and Rimuru replaced the Arc Reactor with Great Sage's help.
• Tony questioned Rimuru about his identity, and Rimuru revealed his other-universe origin, magical abilities, and slime body.
• Rimuru offered Tony a recovery potion and proposed investing in Stark Industries; Tony saw its potential, and they agreed to work together.
• Nick Fury ordered Coulson to contact Rimuru and arranged for S.H.I.E.L.D. to create him a plausible background.
• Rimuru secured ten percent of Stark Industries' shares and four billion dollars, beginning his partnership with Tony.

Rimuru signed the documents that made her Tony Stark’s adopted child and a member of the Stark family. Pepper then began planning a high-end wardrobe for her, leaving Rimuru resigned to a flurry of fittings and fashion choices.

• Pepper presented Rimuru with identification documents, share-transfer proof, and adoption papers, and Rimuru signed them.
• Pepper welcomed Rimuru to Stark Industries as a young Stark, while Tony said she could choose how to be addressed.
• Pepper proposed a wardrobe of expensive clothes for different occasions, but Rimuru objected to the girls’ styles and too many dresses.
• Rimuru negotiated for practical clothes in restrained colors, and Tony suggested smart fibers, protective features, and comfortable shoes.
• Pepper scheduled designers and tailors to meet Rimuru the next morning and began arranging measurements and style discussions.

Rimuru built a lightweight Knight armor to compete with Tony’s Mark II, then beat him in an aerial test by using superior speed and agility. Tony admitted defeat but defended his armor’s broader combat design, leaving the two arguing over their competing approaches.

• Tony researched Rimuru’s recovery potion and developed a less effective healing product that helped Stark Industries’ stock price recover.
• Rimuru challenged Tony to an armor-building competition, and Tony gave Rimuru access to his lab, materials, and JARVIS.
• Rimuru built the Knight armor and raced Tony’s Mark II at Stark Tower, where the Knight outmaneuvered the Mark and avoided icing problems.
• Tony’s helmet display went black from severe icing, and Rimuru had JARVIS record Tony’s embarrassing defeat.
• Tony crashed through the villa floor and crushed a sports car, then conceded the competition while criticizing the Knight’s limited protection.

Rimuru evaded Coulson and his agents, prompting Nick Fury to order continued observation without contact. Rimuru then chose a secluded Chinese-style estate in Flushing as his new home and potential laboratory.

• Coulson led agents to approach Rimuru, but Rimuru knocked them out with an anesthetic before they could reach him.
• Nick Fury learned that the agents had been drugged and ordered Coulson to observe Rimuru without making contact.
• Rimuru met real estate agent Catherine in Flushing to view a Chinese-style estate that had been maintained and modernized.
• Rimuru chose the estate for its privacy, familiar style, and soundproof basement, and Catherine began discussing the price and paperwork.

Rimuru learned that Obadiah had attacked Tony and rushed to help, but Tony fought Iron Monger while Rimuru kept Pepper safe. Rimuru defeated Obadiah with an ultrasound blast and left after the battle, while Tony planned to soundproof his armor against the attack.

• Pepper called Rimuru because Tony was not answering, and Rimuru warned her and Phil Coulson that Obadiah had built armor and told them to escape.
• Rimuru arrived at Tony's lab, found it empty, and used JARVIS to locate Tony as Obadiah attacked Pepper and the agents.
• Tony arrived and fought Iron Monger, but Obadiah battered him and survived Tony's attempt to freeze him at high altitude.
• Rimuru moved Pepper out of danger and defeated Iron Monger with an ultrasound blast, leaving Obadiah incapacitated.
• Tony asked JARVIS to add soundproofing to his armor, while Rimuru returned to his manor and Coulson failed to build a better connection with him.

Tony Stark abandoned the cover story at his press conference and publicly announced that he was Iron Man. His revelation left Rhodey and S.H.I.E.L.D. to handle the fallout while Rimuru watched with delight.

• Coulson gave Tony an alibi card and urged him to follow the prepared script at the press conference.
• Christine Everhart asked Tony whether he was connected to the freeway and rooftop incidents.
• Tony dropped the card and told the reporters, "I am Iron Man."
• Rhodey faced a storm of reporters, while Coulson messaged Nick Fury about the announcement.
• Tony left the podium, and Nick Fury watched the broadcast with growing frustration.

Nick Fury visited Tony Stark to recruit him for the Avengers Initiative, leaving a file for him to consider. Meanwhile, the System told Rimuru it could take him to other fictional worlds, and he chose to seek an artificial intelligence.

• Nick Fury appeared in Tony Stark's dark home and invited him to join the Avengers Initiative.
• Tony questioned the recruitment terms, and Fury left him a S.H.I.E.L.D. file to review.
• Tony declined JARVIS's offer to strengthen security and asked for coffee so he could read the file.
• Nick Fury postponed visiting Rimuru after learning from Coulson that Rimuru could use powerful ultrasonic waves and was avoiding S.H.I.E.L.D.
• Rimuru learned the System could take him to other fictional worlds, though it could not return him to his original world.
• Rimuru asked the System to take him to a world where he could obtain an artificial intelligence such as Skynet or the Red Queen.

Rimuru arrived in the Ultra Universe and discovered that the system had sent him to Zett’s world to find Gillvalis. After STORAGE brought him in, he told the team he came from another universe to seek help against Ultron.

• Rimuru emerged in a peaceful Japanese-looking city and learned from the system that he was in the Ultra Universe.
• Rimuru identified the world as Zett’s and realized the system expected him to confront Gillvalis, but the system persuaded him to consider waiting until Gillvalis was weakened.
• Shota Hebikura and STORAGE watched Rimuru on a screen, then brought him to their base without resistance.
• Rimuru recognized Juggler and called him by name, prompting Juggler to cover his mouth and insist that he be called Captain Hebikura.
• Rimuru evaded Yuka Ohta’s attempt to examine him and told STORAGE that he was from another universe seeking an AI to help fight Ultron.

Rimuru helped STORAGE and the Ultramen defeat Gillvalis, then swallowed its core so he could use the artificial intelligence. After giving recovery potions to Haruki and Asakura Riku, Rimuru returned to his own world.

• Rimuru joined Juggler's operation to lure Gillvalis with false information about silicon and help defeat it.
• Rimuru and Yoko Nakashima attacked Gillvalis, while Ultraman Geed and Ultraman Z arrived and joined the battle.
• Yuka Ohta distracted Gillvalis by sending it a Millennium Prize Problem, giving Geed and Z a chance to overpower it.
• Rimuru asked Geed and Z not to destroy Gillvalis, and Geed retrieved its core after the battle.
• Rimuru swallowed Gillvalis's core, then gave Haruki and Asakura Riku recovery potions and said goodbye.
• Rimuru activated the system and was pulled through shattered space back to his own world.

Rimuru returned from Virtual Planet Kuscia to find that nearly four and a half days had passed in Tony’s world, prompting Tony and Pepper to search for him and Nick Fury to investigate his disappearance. After Rimuru explained his absence and introduced Gillvalis and the Vallis Knights, Nick Fury withdrew his agents from the manor.

• Rimuru entered Gillvalis’s Virtual Planet Kuscia and found dormant Galactrons and a Vallis Knight in the lifeless virtual world.
• Tony and Pepper searched Rimuru’s manor, and Tony accused Nick Fury of taking Rimuru before they discovered no trace of him.
• Tony found Gillvalis in Rimuru’s laboratory, learned that Rimuru was on Virtual Planet Kuscia, and watched Rimuru and the Vallis Knights return.
• Rimuru learned from Tony that nearly four and a half days had passed while he was away, and he introduced Gillvalis and the Vallis Knights to Tony and Pepper.
• Nick Fury arrived at Rimuru’s manor with agents, spoke with Rimuru outside, and withdrew after confirming he had returned.

Rimuru struggled to keep Gillvalis under control while S.H.I.E.L.D. investigated him, and Natasha Romanoff visited his home under the cover of being Pepper Potts’s secretary. The chapter ended with Rimuru exposing Natasha’s identity as an agent.

• Great Sage reported that Gillvalis’s third logic layer ordered him to eliminate unpredictable variables caused by intelligent life-forms, while Rimuru worked to restore him safely.
• Nick Fury decided to send an agent to make contact with Rimuru after reports of unusual power consumption at his home.
• Tony Stark received a court summons at the Stark Expo and defended the Iron Man Armor before Congress, while Whiplash headed toward him.
• Gillvalis announced a visitor, and Rimuru saw that Natasha Romanoff had arrived at his home.
• Natasha introduced herself as Natasha Rushman, Pepper Potts’s new secretary, and invited Rimuru to Monaco with Tony and Pepper.
• Rimuru detected Natasha’s concealed recording equipment and called her Agent Romanoff, causing her to tense and then relax.

Rimuru told Natasha and Nick Fury that he came from a parallel Earth and claimed he had been displaced while humanity evacuated Earth from its dying sun. S.H.I.E.L.D. decided to handle him cautiously, and Natasha prepared to leave after their conversation.

• Rimuru claimed he was an Earthling from a parallel universe and had arrived in this one by accident.
• Rimuru used Vallis Knight to transform into Natasha and described the Wandering Earth Project, saying strange events had brought him to this universe.
• Natasha questioned Rimuru about his knowledge of her, S.H.I.E.L.D., and the Avengers, while he insisted he knew only general information and wanted a peaceful life.
• Nick Fury ordered Natasha to keep Rimuru calm and try to recruit him without provoking him.
• Rimuru sensed Nick Fury's instructions and decided not to antagonize S.H.I.E.L.D. or surrender his freedom.
• Natasha told Rimuru that S.H.I.E.L.D. understood his situation and prepared to leave.

Rimuru attended the Monaco Historic Grand Prix with Tony and Pepper, where Ivan Vanko attacked Tony on the racetrack. Tony defeated Ivan, but the crude reactor he carried away proved that someone had replicated his technology.

• Rimuru arrived at the banquet with Tony and Pepper and spotted Natasha, Elon Musk, Justin Hammer, and Ivan Vanko.
• Tony unexpectedly raced at the Grand Prix, and Ivan Vanko stepped onto the track and attacked him with an electric whip.
• Pepper threw Tony the suitcase armor after Happy pinned Ivan with a car, and Tony suited up to fight.
• Rimuru dodged Ivan's whip and tried to attack him, but Pepper stopped him from using his powers in front of the crowd.
• Tony claimed he had been testing his armor, then punched Ivan down and ripped out his crude reactor.
• The police took Ivan away, while Tony, Justin Hammer, and the senator reacted to the reactor and the televised attack.

Tony struggled with palladium poisoning while Rimuru urged him to create a new element, and Justin Hammer recruited Ivan Vanko to build weapons against him. After Tony’s drunken party ended with Rhodey taking the armor, Tony realized Rimuru knew what was coming and asked him what to do next.

• Justin Hammer arranged for Ivan Vanko to leave prison, and the two agreed to work together against Tony.
• Rimuru urged Tony to replace palladium by creating a new element, but Tony dismissed the idea before Rhodey arrived to complain about military pressure.
• At Hammer Industries, Ivan Vanko hacked the company’s systems, inspected its armor, and agreed to help Justin undermine Tony.
• Tony held a party, got drunk, and fought with Rhodey, who left with the armor while Rimuru filmed the scene.
• The next morning, Tony demanded that Rimuru delete the footage, then recognized that Rimuru had foreseen events and asked what he should do next.
• Tony called Nick Fury to request his father’s belongings, and Fury suspected Rimuru had revealed their existence.