Chapter Summaries

Eris asked Radeus and Rudeus to teach her magic and swordsmanship, and they agreed under pressure from Sauros and Philip. During sword practice, Eris defeated Rudeus in a single blow, leaving her wondering whether he had pretended to lose.

• Sauros urged Eris to ask Radeus and Rudeus for lessons, and she bashfully requested that they teach her magic and swordsmanship.
• Sauros and Philip praised Eris's cute request, and Radeus and Rudeus agreed to become her tutors.
• Ghislaine began swordsmanship practice and said Eris and Rudeus would spar, while Radeus explained that he had used North God Style techniques against the thugs.
• Rudeus confidently challenged Eris, but she moved too quickly for him to follow and knocked him unconscious with one hit.
• Eris asked Radeus whether Rudeus had put on an act, and Radeus told her that Rudeus was simply that weak.

Radeus coaxed Ghislaine into demonstrating the Sword of Light and copied it on his first attempt, though she warned him he would need to develop his own technique. As Ghislaine began special training with Eris, Radeus confronted the supposedly unconscious Rudeus, who got up and protested his kidney-kicking.

• Radeus dismissed Rudeus after Eris knocked him out and asked Eris whether she had reached Intermediate Swordsman rank.
• Radeus prompted Ghislaine to demonstrate the Sound Sword, then asked her to show him the Sword of Light.
• Ghislaine explained the Sword of Light and demonstrated it, and Radeus reproduced the technique after watching once.
• Ghislaine cautioned Radeus that he needed to create his own Sword of Light and explained how sword ranks differed in speed.
• Eris asked to learn the Sword of Light, and Ghislaine began special training with her.
• Radeus kicked Rudeus and called him out for pretending to be unconscious, and Rudeus stood up and complained about his kidneys.

Rudeus and Radeus fought over a half-finished Roxy figurine, each pretending to yield while secretly planning to reclaim or hide it. Radeus left with the figurine, but the servants had overheard their scheming, leaving him mortified.

• After recalling Radeus's flashy swordsmanship, Rudeus tried to finish his Roxy figurine but worried he lacked details of her body.
• Radeus caught Rudeus talking about him, tossed him to the floor, and claimed the figurine for himself.
• Radeus promised a complete, removable-parts version to recruit Rudeus into the Roxy Faith, and Rudeus pretended to become its deputy leader while planning to steal the figurine back.
• Radeus carried the figurine away while privately deciding not to finish it, unaware that the servants had heard his thoughts and plans aloud.
• Embarrassed by the servants' shocked stares, Radeus retreated to his room, while Rudeus sneezed and suspected his brother was bad-mouthing him.

Rudeus and Radeus taught Eris and Ghislaine magic and arithmetic, then persuaded Philip to let them study the mansion’s books. The chapter left them free to explore the household’s library and pursue their magical studies.

• Eris successfully summoned a Fireball, then accidentally sent it toward Radeus, who extinguished it with a gust of wind.
• Ghislaine persuaded Eris to attend lessons by recounting how illiteracy had left her starving on the streets.
• Radeus gave Eris addition and multiplication tables, helping her answer 9 + 9 correctly.
• Radeus explained to Rudeus that the mansion’s books could help them improve their magic, and they went to ask Philip for permission to read them.
• Philip welcomed them to read whatever they liked and offered to buy anything they needed for their research.

Radeus and Rudeus explored House Boreas’s vast study, where most valuable magic books were written in languages they could not read. While using the toilet, Radeus awakened the Modified Ten Shadows Technique, then accidentally asked the mysterious voice to change how he awakened and panicked when it accepted.

• Philip led Radeus and Rudeus to House Boreas’s enormous study and warned them not to share its books with outsiders.
• Philip explained that many magic books were written in Demon God Language or Beast God Language, and that Ghislaine could teach them the latter.
• After searching the study, Radeus and Rudeus found little useful magic in languages they could read and discussed solving the world’s slow communication problem.
• Radeus rushed to the toilet, where his shadow twisted into black hands that restrained and enveloped him.
• A voice announced that Radeus’s Modified Ten Shadows Technique had arrived, and it changed his awakening method after he jokingly complained.
• Radeus begged the voice to undo the change, while Rudeus mocked his claim that he was no epiphany master.

Radeus explained his modified Ten Shadows Technique to Rudeus, revealing that he could store objects in and travel through shadows and turn creatures he or Rudeus killed into growing, loyal Shikigami. The two then realized Radeus could exploit his nearly cost-free healing magic to survive Mahoraga’s taming ritual indefinitely.

• Radeus returned to the study and told Rudeus that unlocking his ability required him to fulfill prerequisites after he had run his mouth.
• Radeus demonstrated that he could use shadows as unlimited storage and travel through them up to ten meters, though living things risked suffocation inside.
• Radeus explained that he could make Shikigami from creatures he or Rudeus killed, and that the Shikigami could grow stronger while resting in his shadow.
• Rudeus realized that Radeus’s Six Eyes and healing magic could let him endure Mahoraga’s taming ritual without running out of mana or dying.
• Radeus imagined using Mahoraga against future opponents and suggested that he and Rudeus could fight it together if necessary.

Rudeus and Radeus continued their studies and training, with Rudeus struggling against Eris in sword practice while Radeus advanced toward matching Ghislaine. Radeus reimagined the Sword of Light as a blade enhanced with light magic, leaving him intent on making it look like Excalibur.

• Radeus complained that he and Rudeus were making little progress in Demon God Language and that the study had too few books on barrier techniques.
• Radeus explained that he wanted barrier techniques to create magic circles and hoped to engrave healing circuits inside his body.
• Eris defeated Rudeus in a sparring match after Ghislaine coached him on footwork and reading his opponent.
• Radeus trained with weights and a heavy iron sword, bringing his swordsmanship close to Ghislaine's level.
• Radeus reasoned that a literal light-speed sword swing was impossible and decided that a true Sword of Light should use light magic and resemble Excalibur.

Rudeus arranged a day off for Eris, who took the boys and Ghislaine on a morning outing around Roa. The outing revealed their low wages and ended with Rudeus secretly keeping part of Radeus's pay, while Radeus remained unaware.

• Rudeus realized Eris was restless because she had been studying without a break and told her the next day would be a holiday.
• Eris dressed up and took Radeus, Rudeus, and Ghislaine to explore Roa, and Radeus schemed to make Rudeus compliment her second.
• Radeus and Rudeus discussed the city’s prices and their lack of money before Radeus pulled Rudeus away from a vendor selling a potion to make women obedient.
• At a bookstore, Radeus learned that books were expensive and asked about their wages; Rudeus claimed Radeus earned one silver coin a month and handed him a coin.
• Rudeus revealed to himself that Radeus actually earned two silver coins and decided to keep the extra coin, then lied when Radeus asked why he was smiling.

Radeus and Rudeus continued their lessons at Eris's home, where Radeus's talent left Rudeus feeling hopeless by comparison. After receiving a Demon God Language textbook from Roxy, Rudeus learned that Eris's tenth birthday preparations would require him to help her practice dancing.

• Radeus and Rudeus spotted Perugius's Floating Fortress in the sky, and Ghislaine told them Perugius had been one of the Three Heroes who defeated Laplace.
• A year later, Ghislaine praised Eris's swordsmanship, while Radeus mocked Rudeus for remaining only an Advanced Swordsman.
• Radeus and Rudeus opened Roxy's letter and found a detailed Demon God Language textbook she had written for them.
• Edna Lelen visited Radeus's room, but Radeus sent Rudeus to answer the door and handle her request.
• Rudeus told Radeus that Eris's tenth birthday was six months away and that Edna wanted them to help Eris practice dancing.

Radeus helped Eris overcome her reluctance to learn her birthday dance, and she managed to complete it the day before the party. At the celebration, Eris stood beside Sauros as nobles gathered, while Radeus advised Rudeus to secure the dance-partner spot before anyone else could.

• Rudeus complained to Radeus that Eris kept running away from dance practice, and Eris admitted she was afraid of embarrassing her grandfather, Sauros.
• Radeus encouraged Eris to keep practicing, then watched her dance with Rudeus and noticed that her sword-training footwork made her rush ahead of the beat.
• Rudeus guided Eris through the steps using her familiar footwork, and she successfully completed the dance for the first time.
• Radeus learned the party was the next day and told Rudeus to claim the place as Eris's dance partner before anyone else could.
• The next day, Radeus and Rudeus arrived at the mansion's party, where Eris stood beside Sauros in a white formal dress and nobles gathered with their children.

At the banquet, Radeus and Rudeus rescued Eris’s dance after she stumbled, then declined the girls who flocked around them. Later, Radeus gave Eris, Ghislaine, and Rudeus shadow bracelets that let them command his Shikigami and might allow Rudeus to extract shadows himself.

• Sauros invited anyone seeking his favor to take Eris’s hand, but Radeus and Rudeus were too busy eating to respond in time.
• Eris’s dance went badly, so Rudeus and Radeus each danced with her and helped restore her standing.
• The girls at the banquet surrounded Radeus and Rudeus, but the boys politely turned down their invitations.
• Radeus gave bracelets to Eris, Ghislaine, and Rudeus, explaining that they could command Shikigami hidden in their shadows.
• Radeus said the bracelet might let Rudeus extract shadows from creatures he killed, though they still needed to test it.

Radeus and Rudeus accepted gifts and heard Philip’s plan to reclaim House Boreas by marrying Eris to Rudeus and seizing control of the Notos Family through Radeus. Radeus agreed to help, and Rudeus pledged to stand by his brother as they prepared for the noble power struggle.

• Radeus gave Ghislaine and Eris black bracelets, while Rudeus gave them magic staffs; Ghislaine then gave Eris her Exorcism Ring.
• Philip told Radeus and Rudeus that Hilda had initially resented them because her sons had been taken away, but that she now considered them family.
• Philip proposed that Rudeus marry Eris and that Radeus help him take over House Boreas, then seize the Notos Family as well.
• Radeus agreed to Philip’s plan, and Rudeus committed to supporting his brother.

Radeus tested his theory that elemental incantations called on spirits, and Rudeus successfully met several spirits after reciting an invocation. Rudeus returned unharmed, while the spirits’ existence confirmed Radeus’s hypothesis.

• Radeus and Philip agreed that Eris would choose whom to marry and that they would delay their political plan until they came of age; Radeus gave Philip protective bracelets for himself, Hilda, and Sauros.
• Radeus developed a theory that magic incantations asked spirits to convert mana into different elements.
• Radeus persuaded a reluctant Rudeus to test the theory, claiming it might help with Rudeus’s inability to use battle aura.
• Rudeus called out to the spirits and was drawn into a white space, where several spirits identified him as the Divine Child and introduced themselves.
• After nearly ten minutes, Rudeus returned from the white space, confirmed he was alive, and complained about Radeus’s behavior.

Rudeus received a powerful blessing from the spirits, and Radeus discovered that his twin connection let him share it. The brothers planned to become unstoppable, though they learned that blessings could only be granted once a year, and Eris and Ghislaine arrived to find them acting strangely.

• Rudeus told Radeus that the spirits had called him a Divine Child and granted him the world's blessing, which increased his magical abilities and could be renewed with more blessings.
• Radeus tried to contact the spirits, heard Rudeus call him a clown, and realized that he had received the blessing through their twin connection.
• Radeus imagined collecting blessings and using his Healing Spell to become immortal, while Rudeus warned him that the spirits could grant only one blessing a year.
• Radeus urged Rudeus to study Magic Circles and conquer the world, then whispered to him until Rudeus declared himself the King of Blessings.
• Eris and Ghislaine arrived in the courtyard and wondered what had gotten into the two brothers.

After receiving the Blessing, Radeus’s mana reserves surged, and an encounter with Rudeus’s mana at full power caused him to collapse. In the darkness, he completed the Healing Spell Formation inscribed on his soul and body, then woke up and blamed Rudeus for nearly killing him.

• Radeus woke with more than ten times his previous mana, while Rudeus rushed into his room worried about his own mana.
• Radeus’s Six Eyes overloaded when he saw Rudeus, and he passed out as the unfinished Healing Spell Formation began completing itself.
• Radeus entered a white space, saw gaps in his memories, and then recognized the glowing patterns in the darkness as the Healing Spell Formation.
• Tia detected Li Hongyun’s scent, abandoned her work, and ran after it.
• Radeus completed the formation with the Blessing’s help and woke up after Rudeus’s Healing Spells failed to rouse him.
• Radeus accused Rudeus of burning out his brain by approaching with uncontrolled mana while his Six Eyes were at full power.

After Radeus survived brain burnout by engraving a Healing Spell Formation into his soul and flesh, he and Rudeus discovered their mana had become immensely powerful. They tested their magic in a remote grassland, where even their Beginner Rank Fireballs became enormous and dangerous, leaving them needing to learn control.

• Radeus told Rudeus he had recovered by perfecting a Healing Spell Formation and engraving it into his soul and flesh, making himself ageless and immortal.
• Rudeus revealed that his mana capacity and quality had surged, and Radeus attributed the change to the World's Divine Protection.
• Radeus and Rudeus asked Philip to find a remote place where they could test their magic, and Philip sent Ghislaine and Eris with them.
• At the grassland, Radeus cast a chantless Fireball that grew to about twenty meters across, then Rudeus produced a far larger fireball resembling a second sun.
• Radeus extinguished the flames and healed the burns Ghislaine and Eris had suffered, while the group realized the two mages had lost control of their magic's power.

After discovering he could use mana to reinforce his body, Radeus unleashed a devastating Black Flash that pulverized a huge rock. Rudeus gained the same ability through the Blessing and challenged Radeus to a spar, leaving Eris and Ghislaine watching as their fight was about to begin.

• Radeus apologized to Ghislaine and Eris, but Eris refused to forgive him and beat him.
• Radeus tested Black Flash on a huge rock and pulverized it with a mana-reinforced punch.
• Rudeus noticed Radeus had reinforced his body with mana, and Radeus explained that the Blessing let him do so without battle aura.
• Rudeus used the Blessing to reinforce his own body with mana and felt his strength surge.
• Rudeus challenged Radeus to a spar, and Eris and Ghislaine watched as the two prepared to fight.

Rudeus challenged Radeus to a close-combat fight but lost despite landing a Black Flash. As the four traveled home, Radeus offered to teach Rudeus his Reverse Cursed Technique.

• Rudeus attacked Radeus with Night Guy, but Radeus dodged and struck him hard enough to make him heal his injuries.
• Radeus relentlessly battered Rudeus and urged him to make him fall in love, while Rudeus endured and landed a Black Flash by biting Radeus's hand to keep him from escaping.
• Radeus instantly healed and offered Rudeus the chance to surrender, but Rudeus refused and met his final black-lightning punch.
• Radeus won the clash after holding back, then healed Rudeus and praised his fighting ability.
• Radeus offered to teach Rudeus Reverse Cursed Technique on the ride home, then teased him until Ghislaine and Eris laughed.

Radeus inscribed a magic circle on Rudeus, then received his Modified Malevolent Shrine and tested its ability to sever concepts. He successfully erased a tree’s existence on his first attempt.

• Radeus inscribed a magic circle on Rudeus, causing him intense pain, and warned him that using it could stunt his growth.
• Radeus learned that his Modified Malevolent Shrine had arrived, while the voice that delivered it ignored his request to cancel his conditions.
• Radeus studied the shrine’s modified abilities, including its slashes, flames, domain, and chance to sever concepts.
• Radeus went to the courtyard and specified that his slash should cut away a tree’s existence.
• Radeus’s slash made the tree vanish completely, leaving a hole behind, and he wondered whether the success came from high odds or luck.

Radeus returned to Buena Village after Paul asked him to help deal with the growing number of monsters. He surprised Aisha at home, and she recognized him as her older brother.

• Radeus tested Conceptual Slash on two trees and erased them from existence, though traces of them remained.
• Paul wrote to Radeus asking him to come home and help fight the increasingly numerous and ferocious monsters around the village.
• Radeus said goodbye to Rudeus, Eris, and Ghislaine, then flew from Roa to Buena Village using Flight Magic.
• Radeus wondered about the enormous black sphere above Roa before reaching his home and entering through a second-floor window.
• Radeus teased Aisha, who recognized him and called him Radeus-oniichan.