Blaze Gloom has a lot of work she has to do if she wants to conquer Equestria. First things first, she has some Princess' to dethrown.

Twilight starts to investigate dark magic. Which leads her to the path of becoming a master of it. Or, if you prefer, it being the master of her

A foe comes before Twilight that will transform her into anything but herself

What if Chrysalis thought further ahead on how to use Twilight. After all, there was a princess to dispose of and a Changling to make

Twilight is trasfromed into a lamia and the Queen of monsters, she wants her friends to become monsters, too.

Twilight uses her new, dark powers to corrupt her friends and Equesria, sequel to Twilight's Shadow

Twilight meets Sombra and joins the dark side.