History NightmareFuel / SaintSeiya

** The anime episode 16 has Shaina tricking Marin into a vicious fight, under the pretense of a sparring match. The outcome is downright chilling, and if Aiolia hadn't intervened to save her, Marin would have been dead right there.

** Even ''after'' her HighHeelFaceTurn she remains someone to not provoke lightly: in the Poseidon arc she spends some time facing Thetis, it seems an even battle... Then Shaina decides she has better things to do and [[CurbStompBattle mauls her]], with the manga implying that [[spoiler:the wounds weakened Thetis to the point she died saving Julian]].

** His attack against Virtue Eligor in the Lucifer movie is nothing to laugh at either. The illusion starts with Eligor ''decapitating'' Ikki, only for his headless body to walk towards Eligor(which he proceeds to stab to no avail) while the fallen head is taunting him. Then said head screams maniacally about sending him to hell while a swarm of locusts comes flying out of it's mouth towards Eligor, only for the head to ''melt'' afterwards, while Eligor is pierced through the chest and falls dead. Jeez!

* BrainwashedAndCrazy Leo Aiolia versus Seiya. Such brutality and bloodlust coming from a man so honorable is truly a scary sight.

* During the Twelve Temples arc, when the Sagittarius Gold Cloth makes its return, Saga starts doubting whether he actually [[NeverFoundTheBody really managed to off Aiolos or not]]. Saga is sitting in his throne room when all of Saori's ten Bronze Saints barge in to attack. The Gold Saints, all twelve of them and fully armored, jump out of nowhere and put themselves between the invaders and Saga... And then, before Saga can realize there's something wrong with the situation, ''the Gold Saints turn toward him, faces obscured by shadows and only their eyes visible, and come close to kill him themselves''. And there's ''all'' the Gold Saints in the group, including ''[[CardCarryingVillain Deathmask]]'' (who by this point was already killed), ''[[PhysicalGod Shaka]]'' (presumed dead), ''Aiolos'' (who is long dead), Aphrodite ([[TheDreaded described as the most terrifying of the Gold Saints]] by ''Saga himself''), and ''Saga himself''. [[AllJustADream That's when Saga wakes up in terror]]... But this literal nightmare left him so shaken he can't help but look around in fear.

* One of the freakiest things about him is that, even if you count everything above, Saga [[spoiler:''was the good twin.'' His EvilTwin brother, Kanon, was even worse.]]

** His attack against Virtue Eligor in the Lucifer movie is nothing to laugh at either. The illusion starts with Eligor ''decapitating'' Ikki, only for his headless body to walk towards Eligor while the fallen head is taunting him. Then said head screams maniacally about sending him to hell while a swarm of locusts comes flying out of it's mouth towards Eligor, only for the head to ''melt'' afterwards, while Eligor is pierced through the chest and falls dead. Jeez!

** A BrainwashedAndCrazy Hyoga being utterly ruthless against Shiryu. First, Hyoga removes his mask and gets him to lower his guard, offering his hand for a handshake, getting him to think he had just been a spy in enemy territory, for Hyoga's expression to turn downright vicious, freezing his hand to the bone, rendering him nearly unable to fight back, even if he had the WILL to. Shiryu pulls through but gets beaten within an inch of his life before he can strike back effectively.

** All scenes showing the Yomotsu Hirasaka and the poor wretches falling down the pit to the Underworld with wails of despair. The horror factor is further upped from the original anime.

** Overlaps with CreepyGood in some way, but Shaka manages HorrifyingTheHorror when he pulls out his own specters and demons against the Specters in his temple.

* ''Hades Saga'':
** Papillon Myu is a Specter who can transform multiple times. He starts out as a blob, then as a caterpillar-ish thing that will trap you into a cocoon, in which there is a very real possibility you will die. And if you survive this, he will reveal his own BishonenLine final form, and his array of psychokinesis powers.
** Sphinx Pharaoh is a Specter with an Egyptian theme. He can perform the infamous Test of Osiris to see if you're a pure-hearted person by literally putting your heart in a scale to weigh it against the Feather of Truth. ''While you're still alive.''
** Pictured. Ikki pierces Shun's chest and extracts Hades' soul from his body (soul that resemble an abomination), destroying it. Suddenly, Hades' real soul emerges from Shun's chest in ''Film/{{Alien}}'' style, but it turns out that was all a dream in Seiya's head.

** In the anime, the fact that the five Bronze Saints gave Seiya their Cosmo for a Pegasus Comet Fist [[UpToEleven so powerful it disintegrated what remained of his Bronze Cloth and very nearly put him in orbit]], and that Saga... [[NoSell came back for more]]. Or so he thought, until Saori pointed out that Seiya had dealt a lethal blow to his evil side. But the moment he came back was a major OhCrap moment for everyone present.

** In the anime, it is no better. After Seiya managed to use the shield to save Athena, Saga is dealing a NoHoldsBarredBeatdown to Seiya, and Ikki who was only merely delayed comes to the rescue. Cue Saga inflicting the mother of {{CurbStompBattle}}s on Ikki, instantly destroying his Cloth and removing his five senses in the span of a few seconds. The frenzy with which Saga punches in close combat is truly a terrifying sight to behold, so iconic it became one of Saga's combo moves in the fighting games.

*** However, the man is still so skilled and adept at his mimicry, that Shun still falls prey even as Kasa impersonates Ikki ''[[WhatAnIdiot IN FRONT OF HIM]]'', in part due to an AdaptationInducedPlotHole : in the anime Ikki had survived Asgard just fine, but in the manga, Ikki was supposedly dead from having been blasted to smithereens by Saga and gone missing ever since, so at least this version makes it more credible that Shun would desperately want to cling on the hope that his brother was alive.

** And when you thought Alberich could not top that? He can command the very forces of nature to give a trouncing to his opponent. Only Shiryu got around it successfully because he had the [[LuckilyMyShieldWillProtectMe right equipment to deal with the job]], AND the [[UsefulNotes/Meditation mental discipline]] to force a stalemate and block that technique, THEN being a CombatPragmatist by pulling a ISurrenderSuckers forcing Alberich to use "Amethyst Sealed" one time too many, when Shiryu could take it on safely enough without his shield.

** The ensuing conflict is extremely intense and it is truly sobering to see [[Determinator Seiya]] throw everything he has, and Saga standing up for more, brushing up even the Pegasus Rolling Crash as [[NoSell interesting, but ineffective]].

*** You will get drained of your LifeEnergy at a FAST pace, while Camus' Freezing Coffin merely puts you in SuspendedAnimation. Also, the shards of amethyst keep on growing, most likely eating in your body, as these crystals holding skeletons are completely full.

* During the Twelve Temples arc, when the Sagittarius Gold Cloth makes its return, Saga starts doubting whether he actually [[NeverFoundTheBody really managed to off Aiolos or not]]. Saga is sitting in his throne room when all of Saori's ten Bronze Saints barge in to attack. The Gold Saints, all twelve of them and fully armored, jump out of nowhere and put themselves between the invaders and Saga... And then, before Saga can realize there's something wrong in the situation, ''the Gold Saints turn toward him and come close to kill him themselves''. And there's ''all'' the Gold Saints in the group, including ''[[CardCarryingVillain Deathmask]]'' (who by this point was already killed), ''[[PhysicalGod Shaka]]'' (presumed dead), ''Aiolos'' (who is long dead), Aphrodite ([[TheDreaded described as the most terrifying of the Gold Saints]] by ''Saga himself''), and ''Saga himself''. [[AllJustADream That's when Saga wakes up in terror]]... But this literal nightmare left him so shaken he can't help but look around in fear.
* Gemini Saga, appearing to be a sincerely pure and good man, having a seizure in front of Seiya, before turning into evil incarnate out of the blue.

** Pictured. Ikki pierces Shun's chest and extracts Hades' soul from his body (soul that resemble an abomination), destroying it. Suddenly, Hades' real soul emerges from Shun's chest in ''Film/{{Alien}}'' style, but turn out that was all a dream in Seiya's head.

** Anyone invading his Temple is shown a beatiful illusion of a magnificent land... That can turn into hell at a moment's notice.

*** In the manga, this attack is so terrifying that Shaka took away Ikki's memory of their first encounter to ''prevent him from going insane'', and when he restored it Ikki tried to ''run for the hills''. '''Ikki'''.

** During the Hades saga he reveals a new attack, Tenkūhaja Chimimōryō-with which he summons evil spirits and sicks them on his victims. The Specters facing it, [[HorrifyingTheHorror who usually live in hell itself]], were ''terrified'' by it.

*** And to make it worse, Alberich lies about the NoOntologicalInertia aspect of this technique. Meaning, he knows that if he dies the spell will be broken, and he also knows he is a physical pushover in close quarters who could not win in a fair fight, so he pulls that card every time he is at a disadvantage. This means after getting in a lucky hit on Marin and trapping her, he plays Seiya and Hyoga like fiddles, [[ManipulativeBastard tugging at their heart strings by pulling the "If you kill me, they're doomed!" card]].

** Almost forgetting... Even if you kill him, ''he won't stay dead''. Ikki used a [[HeroicSacrifice suicide attack]] to take him down, and all he could manage was to warp the both of them in AnotherDimension, from which Shaka could have ''still'' come out on his own. The only reason he asked for Mu's help in teleporting back to the Sanctuary was because at that point, [[FaceHeelTurn Shaka decided to spare Ikki's life]], and couldn't bring him along on his own. And when he ''does'' die in the Hades Saga, [[spoiler:something that happened only because he threw the fight and even had to instruct his opponents on what to do because he was just that superior]], the end result was that [[spoiler:[[StormingTheCastle he had finally found a way to invade Hades' realm and wipe out his army in their base before attacking Hades himself]]]].

** And when you thought Alberich could not top that? He can command the very forces of nature to give a trouncing to his opponent. Only Shiryu got around it successfully because he had the [[LuckilyMyShieldWillProtectMe right equipment to deal with the job]], AND the mental discipline to force a stalemate and block that technique, THEN pull a ISurrenderSuckers forcing Alberich to use "Amethyst Sealed" one time too many, when Shiryu could take it on safely enough without his shield.

** Lymnades Kasa. A very creepy MasterOfIllusion and telepath specialized in plucking the memories of your dearest person, and mimicking their appearance to lead you to bring down your guard, becoming ripe for the killing, basically weaponizing a HeartwarmingMoment. Seiya and Hyoga fall prey to it, and Shun narrowly escapes it thanks to his chain sensing murderous intent.