Chapter Summaries

Rimuru’s confrontation with the crest-covered witch appeared in Rin’s dream, while Shirou began training with Saber and then openly acknowledged his alliance with Rin and Rimuru. At school, Rin turned to Shirou for help accessing the Magicians’ online network and revealed that Rimuru was its celebrated founder, the Father of Modern Thaumaturgy.

• Rin dreamed that Rimuru unleashed a storm and charged the witch, then woke frustrated that Independent Action had left her alone.
• Shirou returned home late, apologized to Saber, and asked her to train him before using “Trace... on!”
• Rimuru soothed an angry Rin through the night, and she arrived at school exhausted the next morning.
• Shirou greeted Rin and Rimuru as allies, while Rimuru warned Rin not to underestimate Shirou or leave Saber unprotected.
• Rin borrowed the student council computer from Shirou and logged into the Magicians’ online headquarters.
• Rin explained that Rimuru had revived and established the Modern Magecraft Department, earning the title Father of Modern Thaumaturgy.

Rin Tohsaka and Shirou Emiya searched the Modern Magecraft Department’s website for information about Alice Kuonji, uncovering her connection to Rimuru’s past. Rimuru arrived and explained why Alice’s profile was sparse, then reflected on how little he had contributed to Modern Magecraft’s rise.

• Rin Tohsaka and Shirou Emiya explored the Clock Tower’s website and learned about Waver Velvet El-Melloi’s role in establishing Modern Magecraft.
• Rin searched the Magician Network Encyclopedia for Alice Kuonji but found no results, then used Rimuru’s profile to trace an incident from twenty years earlier.
• Shirou Emiya connected the profile’s reference to the Last Bird Alice with Yuzuriha, and Rin found Alice Kuonji’s brief entry.
• Rimuru revealed that Yuzuriha disliked people discussing her, then teased Rin by looking through her browsing history and admiring his portrait.
• Rimuru said Eler and Waver had truly developed Modern Magecraft, while he had only provided limited support.

Rimuru and Rin learned that Caster had abducted Saber from Shirou’s residence, and Rimuru explained the danger of attacking Caster’s fortified territory. Rin chose to rescue Saber, and the group set out for Ryudoji Temple with Shirou included because Caster might target him.

• Rimuru told Rin about Yuzuriha and suggested she could visit her in Misaki Town while studying at the Clock Tower.
• Rimuru taught Rin to use a computer, but she failed to learn how to type with both hands.
• Rimuru, Rin, and Shirou found traces of Caster’s magecraft at Shirou’s residence and discovered that Saber had been taken.
• Rimuru explained that Shirou’s weak magical support had lowered Saber’s parameters and warned that Caster had fortified Ryudoji Temple with energy gathered from over a hundred people.
• Rin decided to rescue Saber, and Rimuru agreed while warning that other factions might exploit the attack.
• Rimuru convinced Rin to bring Shirou along, reasoning that Caster might otherwise attack his residence.

Rimuru and Rin reached Ryudoji Temple, where they discovered Sasaki Kojiro guarding the gate as an illegally summoned Assassin. Rimuru distracted Kojiro into preparing Tsubame Gaeshi while secretly placing a Flying Thunder God mark, then sprang his Two-Level Reversal.

• Rimuru explained to Rin why Casters relied on schemes and how a Master's compatibility could influence a Servant's class.
• Rimuru, Rin, and Shirou encountered Sasaki Kojiro at the Ryudoji Temple gate, where he revealed he had been summoned by Caster to guard it.
• Rimuru explained that Kojiro was an illegal summon and discussed the risks of summoning a second Heroic Spirit; Rin said she would trust Rimuru if he needed help.
• Rimuru challenged Kojiro to a contest of sword techniques and distracted him while secretly planting a Flying Thunder God mark.
• As Kojiro began Tsubame Gaeshi, Rimuru launched his Two-Level Reversal.

Rimuru led Rin and Shirou into Ryudoji Temple to rescue Saber, leaving Sasaki Kojiro to guard the mountain gate, then confronted Caster. Their fight escalated into a magecraft duel as Caster unleashed tracking Magic Cannons that forced Rimuru to dodge.

• Rimuru swapped places with Sasaki Kojiro and hurried past him with Rin and Shirou, explaining that he wanted Sasaki to keep guarding the mountain gate.
• Rimuru led Rin and Shirou to Ryudoji Temple and stopped Shirou from shouting, then sensed Saber in a side room but found Caster above them.
• Caster blocked their path, and she and Rimuru traded insults about her illegal summoning, their magecraft, and her earlier flight from him.
• Rimuru attacked Caster, but she used Teleportation and time-altering magecraft to evade him and left behind a substitute.
• Caster fired volleys of purple Magic Cannons, cracked Rimuru’s golden barrier, and blasted a crater into the courtyard.
• Caster’s tracking beams swept across the temple, forcing Rimuru to leap onto a building before they cut it in two.

Rimuru defeated Medea’s attacks, freed Saber, and repeatedly shot Medea down as she tried to escape. Just as Medea prepared to fight back, an unknown attack clashed with Rimuru’s shot, and Gilgamesh appeared with Assassin and Rider.

• Rimuru used a Pseudo-Spiral Sword to strike Medea out of the sky and disrupt her magical territory’s defenses.
• Rimuru explained how Medea’s territory recorded magecraft, then destroyed the ritual binding Saber and freed her.
• Saber confronted Medea while Rimuru shot her down again after she tried to flee, despite her rapidly healing wounds.
• Medea prepared to sacrifice her territory, but Rimuru fired behind the group and clashed with another blazing projectile at the mountain gate.
• Saber recognized Assassin and Rider among the arrivals, and Rimuru identified their leader as Gilgamesh.

Rimuru faced Red Fox, Medea, and their allies at Ryudoji Temple while Gilgamesh watched from the sidelines. As Rimuru began summoning a Servant, Gilgamesh restrained the others and declared that he would not lose to Karna again.

• Rimuru recognized Gilgamesh and offered him a R'lyeh Contract, but Gilgamesh refused and said he had come to watch.
• Red Fox revealed that revenge against Rimuru was his sole wish and persuaded Caster to join him by promising her the Holy Grail and eternal life with her beloved.
• Gilgamesh said he would remain a spectator, while Rimuru and Rin prepared to face the blazing battlefield together.
• Rimuru spread a massive summoning array across Ryudoji Temple and told Saber to buy him time.
• Red Fox recognized the array and attacked, but Gilgamesh bound the fighters with chains and ordered them to let Rimuru summon Karna.

Rimuru asked Alaya to help summon Karna, but a breach in the world barrier also pulled Sylphiel into the summoning. He returned to Ryudoji Temple with Sylphiel as a scythe and confirmed that Karna had answered his call.

• Gilgamesh rejected Red Fox's warnings and insisted he could defeat Karna, while Rimuru used the summoning ritual to reach Alaya.
• Alaya explained that she could not compel Heroic Spirits to respond, but she allowed Rimuru to make his plea, and Karna accepted it.
• A mysterious black thread from the Root connected to Rimuru, and a parchment carrying the power of Hell appeared as Alaya realized outside power had breached the world barrier.
• Alaya sent Rimuru back to Ryudoji Temple, where Sylphiel appeared in his hand as a scythe after being pulled from another world.
• Rimuru ignored Sylphiel's complaints and confirmed that Karna had answered him.

Rimuru’s illegal summons startled the group when Sylphiel appeared instead of Karna, but he revealed that Karna had been summoned too. Karna’s sudden attack left Gilgamesh facing the battle he had expected.

• Sylphiel broke free of Rimuru’s grasp, materialized in a blood-red hexagram, and enthusiastically clung to Saber while demanding a share of the world’s profits.
• Rin inspected Sylphiel and found her physical attributes weak but her Mana and Luck at A++ and her Noble Phantasm at EX, while Red Fox suspected she could kill him.
• Red Fox provoked Gilgamesh into joining the fight by highlighting Sylphiel’s unknown EX-ranked Noble Phantasm, and Gilgamesh turned his anger toward Rimuru.
• Rimuru explained that he had summoned Sylphiel as an example of an illegal summon, then Karna’s spear flew at Gilgamesh and Rimuru revealed that he had summoned Karna as well.

Rimuru’s forces split up to counter the enemy Servants, while Sylphiel faced Gilgamesh with the power of her demonic scythe. Gilgamesh realized that the weapon, rather than Sylphiel herself, was the overwhelming threat as the battle continued.

• Sylphiel opened the Gates of Hell and summoned Servants enslaved by her allure, then claimed Gilgamesh as her opponent while Rimuru recalled Karna.
• Sylphiel shattered Gilgamesh’s Enkidu chains and attacked him with her scythe, while Rimuru sent Karna to fight Red Fox’s Assassin.
• Rimuru charged Medusa and ordered Saber to face Medea, while Red Fox advised Medea to evade Saber and support the others.
• Medea summoned Dragon Tooth Warriors to battle Sylphiel’s Servants as Red Fox warned Gilgamesh that Sylphiel was no ordinary Succubus.
• Sylphiel explained her confidence through Asmodeus’s legacy and her scythe’s full power, then drove Gilgamesh back with sweeping attacks.
• Gilgamesh concluded that Sylphiel’s scythe was the real danger, since her own strength and speed were far below Karna’s.

Rimuru’s side gained the upper hand against Gilgamesh and Rider, but Red Fox destroyed Karna’s Noble Phantasm and threatened to overwhelm him with a fire-wielding divine artifact. Karna asked Rimuru for another weapon to fight with his skill, and Rimuru summoned Sylphiel’s scythe to block Red Fox’s attack.

• Sylphiel transformed into her scythe and chased Gilgamesh, while Rimuru fought Red Fox and Rider.
• Rider used her Mystic Eyes to slow Rimuru, then escaped into the sky on her Pegasus.
• Red Fox grabbed Karna’s spear and used his fiery divine spear to melt Undying Blade, leaving Karna without his Noble Phantasm.
• Karna told Rimuru he could fight without a spear and asked to borrow a weapon from Rimuru’s treasury.
• Rimuru asked Karna about his skill with a war scythe, then recalled Sylphiel and used her scythe to block Red Fox’s attack.

Rimuru fought Red Fox and the Servants, then discovered that his Demon Lord's Edict could compel monster-type summons to obey him. The revelation left Red Fox furious as Medusa struggled against the command.

• Red Fox attacked Rimuru, while Gilgamesh unleashed a rain of swords and Rimuru gave Karna Sylphiel so he could fight Red Fox with a Noble Phantasm.
• Rimuru bombarded Gilgamesh, Rider, and Caster with Noble Phantasms, but Rider struck him with Bellerophon and scattered his body.
• Rin rushed to help Rimuru, and Saber shielded her from Caster's magic until Rimuru returned and protected them with Avalon.
• Rimuru used his newly discovered power to kill Caster, while Karna wounded Red Fox with Sylphiel and Rider turned against Caster.
• Rimuru revealed that his Demon Lord's Edict could compel monster-type summons, and Red Fox realized it had forced Medusa to obey him.

Rimuru fought Red Fox’s group while trying to find Sakura, but Sakura used her shadow domain to pull Rin, Saber, and Shirou into it. As Rimuru withdrew to pursue them through the Shadow World, he told Red Fox that his desire for revenge conflicted with his wish to preserve the Fire Foxes’ ideals.

• Rimuru used his decree to control Rider and ordered her to kill Caster, but Sakura’s shadow blocked the attack.
• Rimuru tried to capture Sakura with a shadow technique, but Sakura appeared and accused him of using Brother Zero’s technique against her.
• Sakura sent a shadow domain beneath Rin, then pulled Rin, Saber, and Shirou into it despite Rimuru’s attempt to destroy the domain.
• Rimuru confronted Red Fox about wanting revenge without abandoning the Fire Foxes’ ideals, while Gilgamesh revealed that Rimuru had been stalling for time.
• Rimuru explained that he planned to find Sakura and the others in the Shadow World, then called Red Fox as tragic and pitiful as Saber.

Red Fox and Karna unleashed their strongest attacks against each other, leaving Red Fox gravely wounded and Karna apparently destroyed. Meanwhile, Rimuru searched the Shadow World for Sakura’s hidden domain, while Gilgamesh and Sylphiel remained at Ryudoji Temple.

• Gilgamesh chose not to fight Karna as Red Fox tried to pursue Rimuru, and Karna blocked Red Fox’s path to protect Sakura.
• Red Fox summoned his Divine Domain: Purgatory of Nirvana and unleashed a Phoenix attack, while Karna released his armor and prepared Sun Wheel, Obedient to Death.
• Karna’s spear pierced the Phoenix and struck at Red Fox, and their attacks caused a devastating explosion that destroyed the domain.
• Red Fox emerged alive but gravely wounded, while only Sylphiel’s scythe remained where Karna had been; Sylphiel approached Red Fox as Gilgamesh tried to stop her.
• Rimuru searched through the Shadow World with Great Sage for a connection to Sakura’s concealed domain, which Great Sage believed it could eventually locate.

Rin Tohsaka confronted Sakura inside her Blood Palace Reality Marble, where Sakura explained that her desire to kill Rimuru came from both loyalty to Assassin and a childhood grudge. The chapter ended with Sakura revealing that the domain embodied her fear of Rimuru and unleashing its Shadow of Fear against Shirou and Saber.

• Rin, Saber, and Shirou woke inside Sakura's Blood Palace, and Sakura asked Rin to abandon Rimuru.
• Rin refused, arguing that Rimuru had become family to her just as Assassin had become family to Sakura.
• Sakura declared that she would kill Rin, then summoned Shadows of Fear that pursued Shirou and grew stronger through fear.
• Shirou attacked a Shadow of Fear with projected swords, but Saber split it apart only for it to multiply and continue pursuing him.
• Sakura told Rin that the Blood Palace recalled the Matou Family massacre and that Rimuru had been a nightmare from her childhood.
• Sakura admitted that she hated Rimuru for making her witness bloodshed as a child and prepared to fight.

Rimuru traced Sakura’s shadow realm after Sylphiel helped him escape danger, while Sakura’s Shadow of Fear attacked Shirou, Saber, and Rin. With Rimuru’s aid, Shirou awakened Unlimited Blade Works, and Rimuru arrived to rescue Rin and destroy her shadow.

• Sakura sensed the Nirvana Feather burning and left Rin’s group as the Shadow of Fear spread, trapping Rin and Saber with hostile copies of themselves.
• Sylphiel blocked her scythe from killing Red Fox and sent him into shadow, allowing Rimuru to trace a connection to the real world.
• Shirou struggled against the growing monsters while Saber urged him to deploy a Reality Marble; Rimuru lent him strength from afar.
• Shirou activated Unlimited Blade Works, replacing the nightmare’s surroundings with his blade-filled territory.
• Rimuru appeared beside Rin, tore apart her shadow, and confused her when she responded by stepping on his foot.

Rimuru healed Saber, left Shirou to face Shadow, and tracked Sakura and the wounded Red Fox to their hidden domain. He confronted them and forced Red Fox to retreat with Sakura, warning that he would find a way to kill him permanently if they clashed again.

• Rimuru healed Saber and explained that Shadow’s immortality depended on its domain, then told Shirou to use Unlimited Blade Works to fight it while he pursued Sakura and Assassin.
• Sakura found Red Fox badly wounded by Karna’s God-Slaying Spear and refused to abandon him, despite Red Fox’s belief that saving him had exposed their location.
• Sakura encouraged Red Fox by arguing that Rimuru relied on outside help, but Rimuru arrived through a crack in space with Rin and revealed that he had seen through their concealment.
• Rimuru threatened Red Fox and Sakura, and Red Fox held back from attacking to protect Sakura.
• Red Fox vowed to make Rimuru pay next time, while Rimuru warned that he would find a way to end Red Fox’s resurrection if he provoked him again.

After Red Fox and Sakura were expelled, Rimuru explained to Rin how worlds beyond the Root connected through the void and encouraged her to broaden her horizons at the Clock Tower. Meanwhile, Sylphiel revealed her death-dealing scythe and killed Rider, then turned its power toward Caster; Rimuru and Rin discovered everyone had disappeared.

• Red Fox and Sakura were expelled from the world, and Red Fox vowed to pursue Rimuru in another world.
• Rimuru told Rin that he had crossed the Root into the void, then claimed the Third Magic had fixed his soul and enabled his journey.
• Rimuru explained that Tokiomi had wanted Rin to attend the Clock Tower so she could encounter other talented Magicians and broaden her perspective.
• Sylphiel summoned her EX Noble Phantasm, bound Rider with black chains, and killed her with a curse that consumed her soul.
• Sylphiel revived Rider through the Gates of Hell, explained that her instant-death judgment consumed accumulated souls, and targeted Caster next.
• Rimuru and Rin returned to Ryudoji Temple and realized that everyone else had disappeared.

Sylphiel fought Sasaki Kojiro at Ryudoji Temple while pursuing the caster, leaving him gravely wounded before Rimuru healed him and persuaded him to guard the mountain gate. As Rimuru and Rin left, Saber questioned her wish to change the past but did not abandon the Holy Grail War.

• Sylphiel chased the fleeing caster, but Sasaki Kojiro blocked her at the mountain gate and she pierced his heart with her scythe.
• Rimuru and Rin found Kojiro gravely wounded beside Shirou and Saber, and Rimuru healed both Kojiro and Saber.
• Rimuru argued that Kojiro had already fulfilled his duty to the caster and persuaded him to guard the mountain gate for Rimuru instead.
• Rimuru took Rin home rather than continue hunting the caster, saying they had already achieved their goal for the night.
• Saber told Rimuru that understanding her subjects might have changed her fate and wondered whether erasing her history as king had been an escape, but she said she was not giving up on the Grail.

Rimuru helped Saber recognize that her wish to return to the past was no longer about denying her identity as a king, though he believed the Holy Grail could not fulfill it. After Sylphiel caused trouble at the church, Rimuru summoned her back, where she teased him by suggesting he was jealous.

• Saber told Rimuru that what she wanted to change had changed, while insisting she would not give up on the Holy Grail.
• Rimuru explained to Rin that the Holy Grail was an incomplete form of the Third Magic and could not grant Saber's wish to change the past.
• Animusphere challenged Rimuru's certainty about what might be possible in the future.
• At the church, Sylphiel demanded that Gilgamesh become her pet or tell her where Souichirou Kuzuki was, wrecked the courtyard, and took some of Cú Chulainn's essence.
• Rin received a church familiar's letter about Sylphiel, and Rimuru used the Hell Contract scroll to summon her back.
• Sylphiel denied being attracted to Gilgamesh, then teased Rimuru by asking if he was jealous and offering herself to him.