History NightmareFuel / ACertainMagicalIndex

** We finally get the Imagine Breaker's antithesis: [[spoiler: the World Rejector]]. What it does to anyone, even [[spoiler: Magic Gods]], and how they seem to be fine with its effects, are truly horrifying.

* Shizuri Mugino after she [[spoiler:CameBackWrong.]] She gains[[spoiler:GlowingEyesOfDoom]] and her already [[{{Yandere}} freakishly]] [[AxCrazy crazy]] personality makes matters even worse. She even threatens to [[spoiler:burn off Rikou's virginity]]!

** St. Germain's true nature [[spoiler:It is a [[HiveMind collective identity]] created by a magician out of the legend of St. Germain. By using microbes and techniques based on acting trances it can easily brainwash people to synchronize them to the network. Many of the people it uses on the novel are espers, so they are injured every time they use magic.]]

** Made even worse than that when we find out ''why'' they're so fanatic. The Adriatic Sea arc shows exactly what the "magician"/ChurchMilitant side of the Roman Catholic Church in the world setting does to the magician nuns that fail them. The Agnese forces are magically compelled to wear extremely humiliating and {{Striperific}} clothing then treated as actual depraved sluts because they're wearing those outfits, continually driven to work to the point of life-threatening exhaustion, beaten, and berated for the slightest hesitation or defiance, real or imagined (mostly imagined) and Agnese herself gets all that PLUS she was forcefully fed to a magical artifact that would have completely destroyed her mind, leaving her as a vegetable so that the self-righteous "Cardinal" could launch an attack on Academy City with the fleet of magically summoned ice-ships [[InsaneTrollLogic for the crime of ''unknowingly'' "resisting" a powerful mass-mind control artifact deployed by a self-righteous knight templar "priestess" that went and acted of her own volition by using fireworks at the end of a festival, like they've been doing ''for years.'']] Basically, if that self-righteous twit hadn't attacked Touma and Orsola in Italy, he would have carried out a massive WhyDidYouMakeMeHitYou on not only the Agnese forces, but all of Academy City. Even when in Neccesarius' custody, he ''STILL'' thinks it was the right thing to do.

** Made even worse than that when we find out ''why'' they're so fanatic. The Adriatic Sea arc shows exactly what the "magician"/ChurchMilitant side of the Roman Catholic Church in the world setting does to the magician nuns that fail them. The Agnese forces are magically compelled to wear extremely humiliating and {{Striperrific}} clothing then treated as actual depraved sluts because they're wearing those outfits, continually driven to work to the point of life-threatening exhaustion, beaten, and berated for the slightest hesitation or defiance, real or imagined (mostly imagined) and Agnese herself gets all that PLUS she was forcefully fed to a magical artifact that would have completely destroyed her mind, leaving her as a vegetable so that the self-righteous "Cardinal" could launch an attack on Academy City with the fleet of magically summoned ice-ships [[InsaneTrollLogic for the crime of ''unknowingly'' "resisting" a powerful mass-mind control artifact deployed by a self-righteous knight templar "priestess" that went and acted of her own volition by using fireworks at the end of a festival, like they've been doing ''for years.'']]

** Misaki and Seria find [[spoiler:a tiny but incredibly long device was inside Misaki's neck. Seria pulls it out and determines it was messing with Misaki's memories. [[ParanoiaFuel They have no idea how long it was in there and Misaki is scared that her memories of her friendship with Touma were fake]].]]

* New Testament 9: Imagine yourself in Touma's shoes, [[spoiler:trapped in an endless cycle of alternate worlds. Having everyone hate you, even your own parents and teacher, then having someone take your identity, then getting eaten alive, buried alive, paralyzed in a hospital bed and left to rot, and trapped in a pod and launched into space all alone.]]

* New Testament 8: [[spoiler: Ollerus and Fiamma of the Right ambush Othinus and attempt to turn her into a fairy to make her weaker, only for the attempt to [[NiceJobBreakingItHero make her a perfect Magic God, no longer restricted by the 50/50 paradox]]. She apparently kills them both. She apparently makes Touma's companions disappear and gloats that everything that has happened has gone according to her grand design, then pulls Gungnir ''[[EyeScream out of her eye]]''! Touma desperately charges at her, only for her to declare, "These small fights are such a pain. I think I'll just end the world." Everything, save for Othinus and Kamijou Touma, is apparently annihilated, and the accompanying illustration is a completely black page.]]

* New Testament 8: [[spoiler: Ollerus and Fiamma of the Right ambush Othinus and attempt to turn her into a fairy to make her weaker, only for the attempt to [[NiceJobBreakingItHero make her a perfect Magic God, no longer restricted by the 50/50 paradox]]. She apparently kills them both. She apparently makes Touma's companions disappear and gloats that everything that has happened has gone according to her grand design, then pulls Gungnir ''[[EyeScream out of her eye]]''! Touma desperately charges at her, only for her to declare, "These small fights are such a pain. I think I'll just end the world." Everything is apparently annihilated, and the accompanying illustration is a completely black page.]]

** [[spoiler: Accelerator vs. Hound Dog (at least when Kiharu isn't involved) is a MookHorrorShow at it's finest.]]

** [[spoiler: Accelerator vs. Hound Dog is a MookHorrorShow at it's finest.]]

* Don't become [[Spoiler: Etzali's]] enemy. He can attack your friends, hide their bodies, and then take their places without you noticing.

* New Testament 8: [[spoiler: Ollerus and Fiamma of the Right ambush Othinus and attempt to turn her into a fairy to make her weaker, only for the attempt to [[NiceJobBreakingItHero make her a perfect Magic God, no longer restricted by the 50/50 paradox]]. She apparently kills them both. She separates Touma from his companions and gloats that everything that has happened has gone according to her grand design, then pulls Gungnir ''[[EyeScream out of her eye]]''! Touma desperately charges at her, only for her to declare, "These small fights are such a pain. I think I'll just end the world." Everything is apparently annihilated, and the accompanying illustration is a completely black page.]]

* New Testament 7: Swarms of man-eating cockroaches that can also chew through metal, concrete, rubber, and plastic.

* New Testament 7: Swarms of man-eating cockroaches that can also crew through metal, concrete, rubber, and plastic.

* New Testament 6: [[spoiler: Fraulein Kreutune has grown a monstrous mouth and is driven by instinct to try to eat Last Order's brains. Kakine Teitoku has come back, looking like a white zombie. He's also created an enormous army of copies of himself, as well as demonic rhinoceros beetles. [[FightingAShadow They are all him]].]]

* New Testament 6: [[spoiler: Fraulein Kreutune has grown a monstrous mouth and is driven by instinct to try to eat Last Order's brains. Kakine Teitoku has come back, looking like a white zombie. He's also created an enormous army of copies of himself, as well as demonic rhinoceros beetles. [[FightingAShadow They are all him]].]]
* New Testament 7: [[spoiler: The Sixth Level 5, Etsu Aihana, is finally introduced. He's practically the [[BodyHorror creature]] from ''Film/TheThing1982'' in human form.]]

* New Testament 6: [[spoiler: Fraulein Kreutune has grown a monstrous mouth and is driven by instinct to try to eat Last Order's brains. Kakine Teitoku has come back, looking like a white zombie. He's also created an enormous army of copies of himself, as well as demonic rhinoceros beetles. [[FightingAShadow They are all him]].]]

* New Testament 6: [[spoiler: Fraulein Kreutune has grown a monstrous mouth and is driven by instinct to try to eat Last Order's brains. Kakine Teitoku has come back, looking like a white zombie. He's also created an enormous army of copies of himself, as well as demonic rhinoceros beatles. [[FightingAShadow They are all him]].]]

* New Testament 6: [[spoiler: Fraulein Kreutune has grown a monstrous mouth and is driven by instinct to try to eat Last Order's brains. Kakine Teitoku has come back, looking like a white zombie. He's also created an enormous army of copies of himself. [[FightingAShadow They are all him]].]]

** Perhaps his most gruesome kills were made during the Invasion by Vento of the Front, when [[spoiler:Hound Dog kidnapped Last Order]]. [[https://www.youtube.com/watch?v=criARmG7wx4 This happens when they try to pursue him.]]

* Accelerator. Pretty much anything he does while in violent mode, including [[spoiler: brutally killing 10,000 teenage girls, chewing on at least one of those girls' fingers, executing a team sent after him in the most traumatizing and MindRape -y ways possible.]] And then you factor in his Powers which make him more or less invincible. Unless you are stronger than a nuke or happen to have an ability that trumps his and he can't adapt to (so far, only Touma), he is essentially unkillable.