History NightmareFuel / BeybladeMetalFusion

* The Arrangement in general. Depending on whether your genetics are 100% compatible with it or not, which only Jack, Damian and Toby have proven to be, going through the process can be VERY painful. Almost all the people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as leaving them with '''severe physical/mental trauma and rendering them cripples for the rest of their lives!''' Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions and in the cases of Jack and Damian, possible insanity. It even turns a NiceGuy like Zeo into someone who is loaded with hatred, and he wasn't even fully compatible with the Arrangement. Jack ended up becoming more than willing to casually turn people and their beys into [[MadArtist works of art drawn with what might as well be a chainsaw]]. Then there's Damian, who spent several years in the highest level of Arrangement to the point where his original personality was almost certainly erased entirely, turning him into someone whose entire purpose of existence is essentially to carry out the will of [[MadScientist Dr. Ziggurat]], not to mention the sheer levels of sadism that came with it as [[MasterOfAll Julian Konzern]] can testify. ''' And let's not even start on what it did to Toby'''.

* Julius' ghastly [[http://i1036.photobucket.com/albums/a442/XUserBolt2345/Julius%20Nightmare%20Face%20I_zpsfaere4dj.png expression]] [[http://i1036.photobucket.com/albums/a442/XUserBolt2345/Julius%20Nightmare%20Face%20II_zpslzrqudfb.png after]] he crosses his DespairEventHorizon when he lost against Damian. The way it's drawn is just downright ''terrifying''.

** Adding to that, Damian is also ready to get Kerbecs to beat you up with chains whenever you do or say something funny to him.
** Something scarier? The Hell dimension can also blast infernos to ''burn you up'', as Kyoya can testify. Worse, they can appear on ''whatever'' spot you are standing. Being burned by an inferno is no joke!
* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as leaving them with '''severe physical/mental trauma and rendering them cripples for the rest of their lives!''' Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions and in the cases of Jack and Damian, possible insanity. It even turns a NiceGuy like Zeo into someone who is loaded with hatred. Jack ended up becoming more than willing to casually turn people and their beys into [[MadArtist works of art drawn with what might as well be a chainsaw]]. Then there's Damian, who spent several years in the highest level of Arrangement to the point where his original personality was almost certainly erased entirely, turning him into someone whose entire purpose of existence is essentially to carry out the will of [[MadScientist Dr. Ziggurat]], not to mention the sheer levels of sadism that came with it as [[MasterOfAll Julian Konzern]] can testify. ''' And let's not even start on what it did to Toby'''.
* The potential of Twisted Tempo and the Spiral Force. A small discharge was enough to annihilate an entire landscape. And if Ziggurat wasn't lying, a meltdown of it could '''destroy the entire planet'''. If Masamune, Gingka and co. hadn't stopped Faust and Twisted Tempo, it would have been TheEndOfTheWorldAsWeKnowIt.
* The fact that Twisted Tempo can create black holes and drag people into alternate universes with its space-warping ability. If that's not enough, it is shown what happens to those trapped inside the black holes: stuck in a timeless grey-scale world for possibly eternity. THAT is the terrifying ability of a Beyblade with RealityWarper powers. The fact that Faust and Tempo's abilities are based on real life science possibly makes it even more terrifying.

* The potential of Twisted Tempo and the Spiral Force. A small discharge was enough to annihilate an entire landscape. And if Ziggurat wasn't lying, a meltdown of it could '''destroy the entire planet'''. If Gingka and co. hadn't stopped Faust and Twisted Tempo, it would have been TheEndOfTheWorldAsWeKnowIt.
* The fact that Twisted Tempo can create black holes and drag people into alternate universes with its space-warping ability. If that's not enough, it is shown what happens to those trapped inside the black holes: stuck in a timeless, grey-scale world for possibly eternity. THAT is the terrifying ability of a Beyblade with RealityWarper powers. The fact that Faust/Tempo's abilities are based on real life science - read: General/Special Relativity - possibly makes it even more terrifying.

* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as possibly leaving them with '''severe physical/mental trauma and crippling them for the rest of their lives'''. Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions, and in the cases of Jack and Damian, possible insanity. It even turns a NiceGuy like Zeo into someone who is loaded with hatred. Then there's Damian, who spent several years in the highest level of Arrangement to the point where his original personality was almost certainly erased entirely, turning him into someone whose entire purpose of existence is essentially to carry out the will of Dr. Ziggurat. ''' And let's not even start on what it did to Toby'''.
* The potential of the Spiral Force. A small discharge was enough to annihilate an entire landscape. And if Ziggurat wasn't lying, a meltdown of it could '''destroy the entire planet'''. If Gingka and co. hadn't stopped Faust and Twisted Tempo, it would have been TheEndOfTheWorldAsWeKnowIt.
* The fact that Twisted Tempo can create black holes and drag people into alternate universes with its space-warping ability. If that's not enough, it is shown what happens to those trapped inside the black holes: stuck in a timeless, grey-scale world for possibly eternity. THAT is the terrifying ability of a Beyblade with RealityWarper powers.

* Reiji. Let's do a list, shall we? He enjoys tormenting his opponents, even after he's clearly already won the battle (during his battle with Hyoma, for example, where we see Poison Serpent actually wrapping itself around Hyoma's neck in a way that would make someone think of strangulation), he has no qualms about scaring the everloving crap out of little kids and he talks like snake going after his prey. His eyes are also usually hidden and, when they open, he looks outright insane!
* Yu being betrayed by Dark Nebula. The kid only lost one time and he was forced to battle Reiji, who stuck to his usual routine of tormenting his opponent. Made even worse when Yu spotted Ryuga watching him and begged him to help, only for Ryuga to turn and walk away from him, showing that the person he thought was a good friend was only using him, shredding the last bit of hope he had for anyone to help him. He manages to escape but, when he appears before Gingka and his friends, he looks completely battered and passes out immediately after he saw them, as if he's just then finally reached the limit of his energy. He's then captured again and left in a dark room, just being forced to wait for whatever punishment might be coming to him.

** Adding onto this, the dark power itself. It continuously gained more and more power inside of Ryuga's body until it completely took control of Ryuga's body and made him take on the appearance of demonic, dragon-like creature.
* For whatever reason, after gaining Dark Bull, Benkei seemingly goes ''utterly insane'' with power. He begins hallucinating Gingka and starts screaming the word "Bull" over and over again. Despite the narm of his English voice, it's very unsettling to watch in action.

* Continuing on the subject of the dark power, we learn a lot about it in this season when it's discovered that it's infected Tsubasa, bringing out a darkness in his heart that we eventually learn about through flashbacks. Tsubasa's dark side was just completely insane and only wanted to win, no matter what. This lead to the destruction of the entire arena during his and Yu's battle against Damoure and Benkei, as well as knocking out Damoure, Benkei, AND Yu. It makes one wonder why he never told anyone the truth about his past.

** Something scarier? The Hell dimension can also blast infernos to ''burn you up'', as Kyoya can testify. Worse, they can appear on ''whatever'' spot you are standing. Being burned by an inferno is not a joke!
* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as possibly leaving them with '''severe physical/mental trauma and crippling them for the rest of their lives'''. Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions, and in the cases of Jack and Damian, possible insanity. In fact, it turns Zeo, who is previously such a NiceGuy into someone who is loaded with hatred. Then there's Damian, who spent several years in the highest level of Arrangement to the point where his original personality was almost certainly erased entirely, turning him into someone whose entire purpose of existence is essentially to carry out the will of Dr. Ziggurat. '''Let's not even start on what it did to Toby'''.

* Rago's line to Kenta in Episode 148 more or less qualifies as this, where he threatened to ''kill him''. You know it is a nightmare fuel when a villain attempts to kill a hero in a mostly MerchandiseDriven kids show.

* The potential of the Spiral Force. A small discharge was enough to annihilate an entire landscape. And if Ziggurat wasn't lying, a meltdown of it could '''destroy the entire planet'''. If Gingka and co. hadn't stopped [[spoiler:Faust and Twisted Tempo,]] it would have been TheEndOfTheWorldAsWeKnowIt.

* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as possibly leaving them with '''severe physical/mental trauma and crippling them for the rest of their lives'''. Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions, and in the cases of Jack and Damian, possible insanity. In fact, it turns Zeo, who is previously such a NiceGuy into someone who is loaded with hatred. Then there's Damian, he spent several years in the highest level of Arrangement to the point where his original personality was almost certainly erased entirely, turning him into someone whose entire purpose of existence is essentially to carry out the will of Dr. Ziggurat. '''Let's not even start on what it did to Toby'''.

** Something scarier? The Hell dimension can also blast infernos to ''burn you up'', as Kyoya can testify. Worse, they can appear on ''wherever'' spot you are standing. Being burned by an inferno is not a joke!
* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as possibly leaving them with '''severe physical/mental trauma and crippling them for the rest of their lives'''. Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions, and in the cases of Jack and Damian, possible insanity. In fact, it turns Zeo, who is previously such a NiceGuy into someone who is loaded with hatred. And let's not even start on what it did to Toby.

* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as possibly leaving them with '''severe physical & mental trauma, crippling them for the rest of their lives'''. Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions, and in the cases of Jack and Damian, possible insanity. In fact, it turns Zeo, who is previously such a NiceGuy into someone who is loaded with hatred. And let's not even start on what it did to Toby.

* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as possibly leaving them with '''severe physical & mental health issues, crippling them for the rest of their lives'''. Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions, and in the cases of Jack and Damian, possible insanity. In fact, it turns Zeo, who is previously such a NiceGuy into someone who is loaded with hatred. And let's not even start on what it did to Toby.

* The Arrangement, in general. Depending on how compatible you are with it, going through the process can be VERY painful. Most people put through the Arrangement suffer terrible physical and mental damage, destroying their blading careers ''for good'' as well as possibly leaving them with '''severe physical & mental health issues for the rest of their lives'''. Even for those that are 100% compatible, the Arrangement brings out, aside from enhanced beyblading skills, intensified negative emotions, and in the cases of Jack and Damian, possible insanity. In fact, it turns Zeo, who is previously such a NiceGuy into someone who is loaded with hatred. And let's not even start on what it did to Toby.