This story is a sequel to Starless Sunlight

Starlight Glimmer could not let herself die. She could not let herself disappear from the world. She could not give up when she still had so much to do. So instead of burning, she writhed. She writhed to keep herself alive, she writhed to escape one day from this fiery hell Twilight had banished her to.
And she waited for the day when Twilight would realize she was still alive.