Engineer spent her childhood equipping the greatest army equestria had ever seen. But after it was defeated she was sealed in stone by the Alicorn Princesses.

Over a thousand years later Grogar decided to recruit a team of villans , and use them to conquer equestria.

He tracked down the Engineer and found her statue in the remains of the castle of the two sisters, he freed her from her stone prison and is offering her an opportunity for revenge.

(This is my first story any feedback would be appreciated)