When you make the Princess of Friendship lose her cool to the point of not wanting to give quarter you will know a fear that even death has shared with you.



She did go Alicorn God on Tirek. He couldn't win, and he knew it so he had to use hostages. Twilight would have ashed him otherwise. The question I want answered is what would happen if all four Alicorns, plus Starlight gave Twilight their magic to her, or all five Alicorns giving their magic to Starlight? I picture Starlight being the Vegata to Twilight's Goku.