The first she and her followers ran into were Reformed Sombra and Radiant Hope. Since she only had enough magic to perform the spell of corruption on one at a time, because it was so cost effective, she preformed the spell on Sombra, making him almost exactly the way he used to be. Shortly after King Sombra attempts to perform the spell of corruption on Hope, but it seemingly failed. Hope ran to warn every pony about the return of Queen Majesty IV, and what she did to Sombra. Because of his cruel behavior at times, King Sombra became the element of cruelty.
A while after, the group found Lord Tirek in his prison, and convinces him to join them in order to once again take revenge on The Mane Six, and take all their magic, along with almost every creature else’s. Because of his never ending desire for more (magic), became the element of greed.
The group then ran into Discord, and after failing to convince him to join Queen Majesty, she then casts the spell of corruption to make him the way she wants, but Discord then eats the spell. At first the group did not know what to do after seeing that, but then Fluttershy came by convinces Discord to leave with her. Unfortunately, it turns out that it was only Queen Chrysalis in disguise. As she quickly consumes Discord’s love, King Sombra turns Discord into a statue while Tirek gets some of his magic. Queen Chrysalis then agreed to join them, and because of her ability to deceive, she became the element of lies.
Afterwards, they ran into Princess Luna. Queen Majesty then decided to humiliate her by taking away her wings, at the exact same spot where she reportedly got them, turning her into an ordinary unicorn. Suddenly, one of the members of the Majestic Resistance noticed Stygian watching and hiding behind the bushes. Queen Majesty tried to use the spell of corruption on him, but then Luna got in the way, hitting her instead, turning her into Nightmare Moon. Luckily Stygian managed to get away, but because of her newly reformed envy and anger, Nightmare Moon became the element of negativity.
Meanwhile, Radiant Hope had brought together the Main Six, and went with them to warn Princess Celestia about Queen Majesty IV, bringing the Elements of Harmony with them, but when they got there, they saw that Queen Majesty had just taken away Princess Cadence’s horn, and Celestia lied there powerless, in horror. Queen Majesty IV, selfish in every way, had become the element of dark magic. Seeing that the Elements of Disharmony were one element short, the Mane Six attempts to use the Elements of Harmony against them, but a beam of darkness appeared, knocking of Twilight’s crown, and stopping the elements. The beam had apparently come from Radiant Hope. She revealed that the spell of corruption that King Sombra used on her actually worked, as she transforms into an umbrum blood pony, revealing the final element, the element of betrayal.
Now that the Elements of Disharmony had formed. They were able to overpower the Elements of harmony and beat the Mane Six. Now, using the elements, they were able to amplify the spell of corruption, and contaminant the water and clouds. Now each representative of the elements have their own land, followers, and slaves. So the remaining creatures, that have neither been brainwashed nor become a slave, must leave Equestria in search of the Lost Elements, in order to amplify the Elements of Harmony and stop the Elements of Disharmony.
Takes place before [**Fiendship is Dark Magic; Chapter 2:** Stygian’s secret](https://derpibooru.org/images/2747753?q=artist%3Achanyhuman) Takes place after [**Fiendship is Dark Magic; Chapter 1; part 1:** The Majestic Resistance](https://derpibooru.org/images/2747711?q=uploader_id%3A579620)