So, I remember reading a story awhile ago. It started off mundane, with Twilight investigating why fillies and colts seem to be wetting the bed, all while having a shared nightmare. Then, shadowy foal like creatures kidnap, among others, Big Mac, Rarity, and Cheerilee, all seeming to be hypnotized to be a breeding ground, under a strange white tree that appears to be controlling the shadow foals, who call Big Mac Daddy, Rarity Mommy, or Mama, etc.

5070970 No one?

Omg! I remember reading that! Can't remember what it's called tho sorry