* ''Manga/FairyTail'' has a few of these like Chapter 134 when [[spoiler: the Oración Seis takes out the entire guild alliance]] and Chapter 169, the beginning of the [[AlternateUniverse Edolas arc]].
** The ending of the Edolas arc too. The heroes are back home, having sorted everything out and patting each other back when, "Oh hey, what's the AlternateUniverse counterpart of the dead childhood friend doing here?"
** However, the biggest one is in Chapter 209: [[spoiler: That the guy who's got death magic... is [[RedBaron Black Mage Zeref]]?! [[OhCrap AND HE'S BACK!?]]]] [[OhCrap Oh jeez.]]
** And again in Chapter 215, where [[spoiler: we learn Master Hades, the leader of Grimoire Heart, is the previous master of Fairy Tail.]]
*** To go into further detail: In Chapters 215 & 216: When [[spoiler: the series BigGood, Makarov, whom many thought was the strongest character in the series was [[CurbStompBattle easily]] [[ImpaledWithExtremePrejudice defeated]] by the next BigBad Master Hades]]. Hades also reveals that [[spoiler: Zeref is "the essence of magic."]]
**** The latter is repeated again but in reverse when after Hades suffers his own [[CurbStompBattle nasty defeat]], when low and behold the previously angsty and self-loathing [[spoiler: Zeref]] shows up and, all the while [[spoiler: freezing Kain Hikaru and Rustyrose with only his presence]], reveals that he has [[spoiler: been "awake" all this time, that he values human life as opposed to everyone believing him to be the BigBad of the series, and that he sees Grimoire Heart and Master Hades as nothing more than trash]]. He then promptly [[spoiler: finishes off Hades for good with one attack, before turning around a feeling something far worse coming over the horizon...]]
***** [[spoiler: And that something turns out to be the black dragon that kicked [[{{Badass}} Gildarts']] ass. The dragon then proceeds to utterly devastate the Fairy Tail mages before destroying the island]]. Holy ''shit''.
** In Chapter 221, apparently [[spoiler:Grimoire Heart intends to use Zeref to kill all of the {{muggles}} in the world and remake it as a world of wizards... and they've just caught the final ingredient]] [[ThisIsGonnaSuck ...dammit.]]
** In Chapter 235, [[spoiler: Azuma uproots the entire Tenrou Tree, and it is revealed its magic was boosting Fairy Tail's magic, and keeping them alive under the Kin's onslaught. In other words, with it gone, not only are the Fairy Tail wizards being further drained of magic, but it also heavily implies that Makarov and Mirajane really are going to die now.]]
** In Chapter 252, [[spoiler:[[HeroKiller Acnologia]] appears]].
** And Chapter 253... Oh My God, the 253rd Chapter... [[spoiler: To elaborate, Acnologia destroys Tenrou Island seemingly along with the entire core cast and many extras, and then has a ''7 year time skip''. Watch out for the wall!]]
*** Note that all of the above happen '''''in the same arc'''''. More like a Wham Arc!
** Personal Wham for [[spoiler:Lucy]] in Chapter 256: [[spoiler:Her father has been dead for an entire month.]]
* [[spoiler: Chapter 297: Glimpses of the near future tell that something quite catastrophic is about to happen. And quite a few people will die from it too...]]
* Chapter 300: [[spoiler: Jiemma ''kills'' Lector. Sting blasts a hole though Jiemma.]]
* Chapter 301: There was once a Dragon Slayer. That Dragon Slayer killed many Dragons and bathed in their blood. He gradually turned into a Dragon. [[spoiler: He is now the Dragon King. That Dragon is Acnologia.]]
** [[spoiler: Oh yeah and he possibly had some help from Zeref.]]
** [[spoiler: Arcadios and Yukino meet Lucy and the Dragon Slayers.]]
* Chapter 312: [[spoiler: The hooded person is from the future...and it's Lucy.]]
* Chapter 314 has a big reveal, as we finally find out why Kagura hates Jellal so much. [[spoiler: She is [[HeroicSacrifice Simon]]'s little sister, [[YouKilledMyFather wishing to kill Jellal]] to avenge her brother. And when [[NotSoStoic distraught]] Erza points put that Simon's death was actually her fault, Kagura slowly pulls out Archenemy...]]
* Chapter 315: [[spoiler: Erza saved Kagura from being kidnapped by Zeref's cultists when they were younger.]]
** [[spoiler:Minerva [[ImpaledWithExtremePrejudice stabs Kagura in the back]]]].
* Chapter 316: Future [[spoiler: Lucy]] wakes up and starts sharing details on what happened. It then crosses over to the Princess who expositions several details, including the apocalyptic event that occurred in the future: [[spoiler: The BadFuture will be caused by a herd of '''''10,000 dragons''''' on their way to attack Fiore and will leave the kingdom in utter ''ruins'']].
* Chapter 323: [[spoiler: Lucy isn't the only person who came from the future, there's also Future Rogue who was hiding in Present Rogue's shadow]]. ItMakesSenseInContext.
* Chapter 324: [[spoiler: We learn that Future Rogue is from 7 years in the future and that he's on a mission to eliminate the person who will close the Eclipse Gates and lead the country to its destruction. This person is none other than Lucy and as Future Rogue rushes in for the kill, Future Lucy makes a HeroicSacrifice and takes the blow straight on]].
* Chapter 327: Turns out that [[spoiler: the Eclipse]], due to certain circumstances, isn't what will save Fiore. Rather, [[spoiler: it's what will bring its destruction via 10,000 dragons.]]