This story is a sequel to Terra
As Twilight is returning to a state of normalcy after her tussle with Tirek, she finds a law long past that references a third princess, one that isn't an alicorn. She rides to Canterlot to ask Celestia who this 'Terra Firma' was, and how she was related. There, she finds Discord and is sent away. There are many questions running through the minds of the main 6, like who that mysterious green and brown alicorn is, and why each member of the elements of harmony are acting bizarre.
I will warn that this can get a little introspective and dark, especially when the main 6 from Terra make their debuts. Each character will show their own signs of depression, anxiety, or both. and there will be serious trauma revealed later on. There will also be triumph, and remember that I'm still a novice writer. I'm open to criticism, and will do my best to fix any errors that slip through.
This is a slightly edited version of the future chapters from Terra, which is not finished. I will post more to Terra when I feel that more information about motives or other such things are needed.