Chapter 25, King is revealed to be the Fairy King by Elaine.
Chapter 28: Meliodas is hinted to be extremely dangerous via his shadow.
Chapter 29: Meliodas is revealed to have destroyed the Kingdom of Danafor in the past when he lost control.
Chapter 30: The Demon Ban killed in his backstory is being used to empower the second generation of Holy Knights.
Chapter 32: Elizabeth is revealed to have come from the Kingdom of Danafor that Meliodas destroyed.
Chapter 51: Meliodas is revealed to have been holding back his power the whole time as he demonstrates by slicing a hill with a mere branch. It's also revealed that he seems to know more about the upcoming Holy War.
Chapter 54: The nerdy looking kid Armando, was in fact Gowther the whole time. It's also revealed that he's a very effeminate-looking man.
Chapter 60: The true goal of the Holy Knights under Hendrickson's faction is revealed. It's to unlock the seal of the Demon Clan to start a war in the kingdom they can fight in.
Chapter 62: King Arthur and his huge army arrive in Liones.
Chapters 66-67: Dreyfus completely overpowers Diane and renders her incapable of fighting back. Though she is at the mercy of him and the accompanying Holy Knights, Howzer and Guila however decide to protect Diane after witnessing firsthand Diane protecting Zeal and the dishonorable lengths their superiors would go.
Chapter 70: The up to now Comically Serious effeminate-looking Gowther reveals that he has a darker side as he completely Mind Rapes Dreyfus with his ability "Nightmare Teller".
Chapters 81-82: Amid a battle against Gilthunder, Hendrickson, and Vivian, Meliodas attacks some sort of monster that was accompanying Princess Margaret completely hidden from sight. Though this forces Meliodas to take a hit and become wide open to an attack from Hendrickson, Gilthunder of all people comes to Meliodas' aid. It's then revealed that Gilthunder was forced to do vile deeds because Margaret had been taken hostage, his Badass Boast of being stronger than any of the Sins was a Survival Mantra taught by Meliodas to give Gil courage should he be in a desperate situation, and because said "Courage Charm" was taught by Meliodas, the latter was able to deduce that Gil was in such a situation right away way back when they reunited in the forest where Diane hid. Furthermore, Gil completely knew of the scheme to frame the Sins back then but was forced not to say anything. Gil also knew the true perpetrator of his father's murder and with Margaret safe, he releases all his pent-up wrath and completely obliterates Hendrickson.
Chapter 85: Hendrickson awakens the Demon Blood in all of the New Generation Holy Knights and turns them into Demons similar to what happened to Dale. The newly awakened Demons then start rampaging all over the capital of Liones, devouring anyone and destroying anything in their path. Basically similar to the infamous Eclipse event in Berserk.
Chapter 93: Hendrickson is revealed to also possess the corpse of a Gray Demon for whose blood he injects into himself to become a winged satanic looking being.
Chapter 108: Dreyfus not only survived, but is revealed to be the true mastermind of all the events that have taken place (with Hendrickson simply being his Dragon. Or, more specifically, the something that is possessing Dreyfus' body is revealed to be the true mastermind of all the events that have taken place.
Chapter 109: The Demon Clan awakens.
Chapter 121: Galan brutally curb-stomps Meliodas, Diane, Merlin, and Slader, seemingly killing them all. Gowther appears and bursts into evil laughter.
Chapter 124: Fraudrin killed Liz.
Chapter 137: Elizabeth is revealed to be the reincarnation of Liz, which seemed only the Druids knew about before chapters 221 and 222 revealed Melodias knew as well.
Chapter 141: Elaine is resurrected... by the Ten Commandments' Melascula. Zhivago dies.
Chapter 153: Fraudrin reveals Gowther is one of the original Ten Commandments, and he himself is a mere replacement after Gowther lost his memories due to his Commandment curse.
Chapter 188-195: Meliodas returns to life due to a curse inflicted on him, though Merlin reveals he loses his emotions with each "death" and gradually reverts to his former demonic self as he seemingly kills Derieri and Mospeet. He also mercilessly kills Fraudin after he is removed from Dreyfus's body and surrenders. Merlin, revealed to be the daughter of Belialuin, captures Greyroad with only Zeldris, Estarossa, Melascula, Gloxinia, and Drole as the only active members left.
Chapter 200: Gloxinia and Drole reveal they have second thoughts about being in the Ten Commandments and recruit Diane and King to put their thoughts to rest by projecting the duo into their past selves. But that pales in comparison to the Wham Shot showcasing Elizabeth... as a Goddess!
Chapter 203: Most of the Goddesses and Stigma are revealed to be led by a warmonger named Ludociel, the leader of the four Archangels who is anything but holy-minded when it comes to the Demon race.
Chapter 212-214: A few humans who teamed up with Stigma are actually seeking revenge against them for them slaughtering their village because they were helping a kindhearted demon heal, and begin an one-sided massacre of their entire ranks. This is how Gerheade ended up disfigured in the present day and what caused her outraged brother Gloxinia to kill Rou in a blind rage and subsequently join the Ten Commandments.
Chapter 215-216: Diane has regained her memories from the original Gowther and reciprocates King's love, culminating with The Big Damn Kiss. With this, King and Diane finalize their evolution into an Official Couple. And on top of this, King finally gains his wings! Plus, Oslow is revealed to be Rou's reincarnation and Drole's pride is the reason why he ended up joining the Ten Commandments as he never considered a third option.
Chapters 221-222: Elizabeth psychically encounters Zeldris, who accuses her of making Meliodas suffer. Melodias is forced to reveal that he and Elizabeth from the past were cursed, made immortal to witness the latter doomed to die within three days of regaining her memories and reincarnate soon after. Melascula is also still alive, something Ban expected since Elaine still lives!
Chapter 235: This chapter confirms something implied by 203. The Ten Commandments are not the strongest force possessed by the demon clan.
Chapter 241: Chandler kills Gloxina and Drole and we get the title for the next chapter: The End of the Seven Deadly Sins.
Chapter 247: Melodias convinces Zeldris to help him become the new Demon King by whispering something in his brother's ear. Several chapters later, it is revealed that Melodias spared the vampire Gelda, Zeldris's lover, and intends to reunite the two in return for his brother's aid.
Chapter 273: Estarossa is really the missing fourth Archangel, Mael.
Chapter 299: Merlin successfully casts Chrono Coffin, stopping time around Meliodas's cocoon. But she is too late as Meliodas has fully absorbed all 10 Commandments to become the new Demon King, grown into an adult form with Elizabeth sensing something is not right.
Chapter 300: It's revealed that Demon King sought a younger vessel than an heir and that the 10 Commandments are fragments of his soul. Demon King Meliodas proceeds to and completely overwhelms the Sins, Mael, and Ludociel.
Chapter 307-310: The Seven Deadly Sins defeat the Demon King and purged him from Melodias's body. Melodias reveals that he awakened his full power as the son of a cosmic being from his time in Purgatory and eliminates his and Elizabeth's curses before releasing Gelda as she searches for Zeldris. However, Melodias's existence makes him too powerful to remain in Brittania as his continued presence causes natural disasters to become increasingly frequent and severe. In a chapter entitled "Farewell", Melodias and Elizabeth prepare to start their new lives together in the Demon Realm, they have a victory party with their friends, and Melodias officially disbands the Seven Deadly Sins. Then, as the two say goodbye to everyone and walk to the portal to the Demon Realm, rocks fall on Elizabeth, showing that her curse is still active. The next Chapter is titled "It's Not Over Yet".
Chapter 311: Merlin saved Elizabeth by a hair, and despite Meliodas blasting the physical form of the Eternal Reincarnation curse at full force, it just regenerates, showing that the Demon King isn't finished just yet: he was able to possess Zeldris after being driven from Melodias's body with Cussack's help.
Chapter 329-334: The Seven Deadly Sins, joined by Gelda, force the Demon King out of Zeldris. But the Demon King refuses to accept defeat as he creates a rudimentary body from Britannia's countryside which he engages the Sins in an epic final battle before being destroyed. Escanor, regaining Sunshine from Mael, dies while Melodias is fully aware that the Demon King's death marks the end of the Era of Gods and the beginning of a new one...
Chapter 334-341: Merlin, revealed to have masterminded the Demon King's death since the end of the Holy War in the past, revives King Arthur as the host of the entity Chaos. Cath is revealed to Cath Palag, a spawn of Chaos seeking to eat Arthur and take his parent's power as his own.
Chapter 343: Arthur, learning of Camelot's destruction, uses Chaos to absorb Cath Palag while intending to use his new power to establish an eternal kingdom. Merlin states her intent to take responsibility for bringing Chaos back into the world.
Chapter 344: The Seven Deadly Sins finally disband and Hawk is reunited with Wild in Purgatory.
Chapter 345-346: Meliodas and Elizabeth become the new rulers of Liones, raising their son Tristan while the holy knight Deathpierce leaves the kingdom in disgust of them to rebuild Edinburgh. At the same time, Ban and Elaine establish their kingdom while raising their son Lancelot.
Sidestories and other
King's backstory: King and Diane's relationship is revealed to be actually deeper than it initially appeared to be.
Vampires of Edinburgh Chapter 1: Escanor is revealed to be a pathetically weak looking shrimp.
Vampires of Edinburgh Chapter 2: Escanor can transform the closer to noon it gets going from wimp to bodybuilder.
Vampires of Edinburgh Chapter 3: Escanor is revealed to be able to control sunlight itself. Meliodas faces Gelda and seemingly kills her, revealed have sealed her away in the main series.
Cursed by Light: The surviving members of the Seven Deadly Sins, minus Merlin, reunite to save Liones from the Supreme Being, whom they destroy with Zeldris's help. Zeldris becomes the new ruler of the Demon World and the Demon Race makes peace with Meloidas. Diane and King get married.
