History NightmareFuel / XiaolinShowdown

-->"HEYLIN POWER! TSUNAMI WATER BLADE: ICE!"

* The [[OurDragonsAreDifferent Sapphire Dragon]]. Just... ''just the Sapphire Dragon''. That thing, along with being an EnsembleDarkhorse of Shen Gong Wu, is considered by many to be one of the scariest things to ever come out of the series. It turns your enemy [[TakenForGranite into solid sapphire]] with [[BreathWeapon bright blue flames.]] As well as anyone in remote proximity. And pretty much anyone else it comes across that doesn't subdue it. Worse still, when it's frozen enough victims, ''they become'' '''its slaves.'''

** It gets worse when he loses all his willpower and [[GrandTheftMe Wuya takes over his body]], the episode shows [[AndIMustScream he's still conscious but unable to keep control of his Shen Gong Wu infused body]]

* Due to OrificeInvasion with which to control you as a PuppeteerParasite, Sibini definitely qualifies.

* Wuya's first resurrection. When it begins, we get a brief flash of her human form before a WorldWreckingWave goes off, causing a solar eclipse and turning the area into a wasteland while the music becomes dark and ominous. Wuya then starts laughing as the camera scrolls up to reveal her human form still wearing her mask...which she takes off to reveal her sharp teeth as she laughs in a pillar of green fire. Wuya goes from a comical sidekick of Jack to a horror show in ''one scene''.
* Omi becoming a demonic and insane BloodKnight after turning evil. To think this is what the little monk boy would be like without his morality but all of his skill.

* The monstrous Chi Creature that escapes from the Ying-Yang World.

[[quoteright:245:https://static.tvtropes.org/pmwiki/pub/images/sd_0.png]]
[[caption-width-right:245:BEHOLD, The Sapphire Dragon!]]

* After Omi tampers with history to keep Hannibal Roy Bean from turning Chase Young evil the Heylin bean decides to go with Plan B and turn Master Monk Guan evil instead. This alternate Guan's monster form resembles a giant mutant crayfish and is deadlier than Chase Young's lizard form.

** Even the man in the usual Shen Gong Wu demonstration is afraid of it. He sets the dragon's statue form down on the ground and ''[[ScrewThisImOuttaHere runs like hell away from it]]'' as his opponent is petrified. Hell, the scroll even says it's to be used as [[GodzillaThreshold an]] ''[[GodzillaThreshold absolute]]'' [[GodzillaThreshold last resort]] since it's the most dangerous Shen Gong Wu to EVER EXIST. [[FridgeHorror Think about that for a second...]]

** Even the man in the usual Shen Gong Wu demonstration is afraid of it. He sets the dragon's statue form down on the ground and ''[[ScrewThisImOuttaHere runs like hell away from it]]'' as his opponent is petrified. Hell, the scroll even says it's to be used as an ''absolute'' last resort since it's the most dangerous Shen Gong Wu to EVER EXIST. Think about that for a second....

* The [[OurDragonsAreDifferent Sapphire Dragon]], just, the Sapphire Dragon. That thing, along with being an EnsembleDarkhorse of Shen Gong Wu, is considered by many to be one of the scariest things to ever come out of the series. It turns your enemy [[TakenForGranite into solid sapphire]] with [[BreathWeapon bright blue flames.]] As well as anyone in remote proximity. And pretty much anyone else it comes across that doesn't subdue it. Worse still, when it's frozen enough victims, ''they become'' '''its slaves.'''

* [[spoiler:Omi becoming a demonic and insane BloodKnight after turning evil. To think this is what the little monk boy would be like without his morality but all of his skill.]]
-->"HEYLIN POWER! [[spoiler:TSUNAMI WATER BLADE: ICE!]]"

** [[spoiler: And then there's when the dragon makes a return. Hannibal Roy Bean fuses it with the Shadow of Fear and Moby Morpher Shen Gong Wu to create a freakish hybrid of the Sapphire Dragon and the monster jellyfish that Raimundo is scared of. The Sapphire Jellyfish. Worse still is that this time since it's the manifestation of Raimundo's nightmare, the monster appears whenever Raimundo falls asleep!]]

* The Monkey Staff, one of Jack's more recurring Shen Gong Wu, simply because of the FridgeHorror behind its power. It gives you the agility, strength, and even a tail of a monkey: it also slowly affects your body and mind so that you begin to ''look'' and ''act'' like a monkey too, laughing like one and more prone to anger and violence. Although often played for laughs Jack pretty much hits the nail on the head in "Year of the Green Monkey":
--> Jack:''[excited]'' I sound like a monkey! I think like a monkey! ''I look like a monkey!'' '''I AM A MONKEY!''' ''[Gives triumph howl]''