This is how Death of Princess Twilight goes in My Little Pony: The Revenge of Unicron.
Thunderwing: Is the future of Unicron's lifeblood not worth a single pony life?
Up. Get up.
Twilight Sparkle: You'll never stop at one. I'll take you all on!
Twilight Sparkle: Piece of junk. Starlight, where are you? [Thunderwing grabs her from behind and stabs her chest with a sword] No.
Thunderwing: You're so weak. [Thunderwing then blasts her chest with his arm-cannon, killing her. Thunderwing then removes the sword from her chest and Twilight falls to the ground weak.]
Unicron: The Element of Magic is dead.
Twilight Sparkle: Starlight...run.