This story is a sequel to Kindness and the Seed of Shadow

The final chapter of the trilogy: Sombra must be released. If they're going to reform him, Fluttershy and Discord need to stand together—but they've each been keeping secrets. And when those secrets come out, the world turns upside down.

And Twilight has an aneurysm.

(Sex tag for occasional implications. Gore tag for the penultimate chapter only.)

This story is a sequel to Kindness and the Heart of Shadow

Shortly after the events of Kindness and the Heart of Shadow, Fluttershy begins to worry how much her foal might take after its father—the evil King Sombra. While Twilight and Pinkie Pie head for the Crystal Empire to learn more about the shadow ponies, Fluttershy comes to a realization that raises the question of immortality. Discord is so afraid of the thought of losing her that he flees, only to come to a terrifying realization of his own...

A Fluttercord story, with a couple other ships thrown in for good measure.

Set immediately following the events of The Beginning of the End, Grogar resurrects Sombra again, and the Shadow King offers a plan that may doom the ponies once and for all: ponynap Fluttershy. In exchange for a promise of her survival, Discord vanishes, and the broken Mane 6 must face the fall of Equestria without either of them. Will friendship prevail? Will love?

A Fluttercord tale.

*Sex tag for certain allusions, though nothing is explicit.