Twilight becomes Nightmare Nova

This is how Twilight becomes Nightmare Nova goes in My Little Pony Transformers: Revenge of the Sith.

[

Nightmare Moon: Nightmare Nova, can you hear me?

Nightmare Nova: Yes, master. Where is Flash Sentry? Is he safe? Is he alright?

Nightmare Moon: It seems in your anger, you killed him.

Nightmare Nova: I? I couldn't have. He was alive, I felt it!

[

]

Nightmare Nova: Noooooo!!!!!