Talk:Twilight's Kingdom - Part 1/@comment-5837525-20140507190627/@comment-24908786-20140507224246

I read it, and the spoilers sucked! There was no mention of what happens to the Princesses after they give their magic to Twilight.

The way I see it: The scene from the trailer of them being cast into Tartarus by Tirek is the bad premonition the Royal Sisters have, and when Tirek arrives to siphon their magic to do so, SURPRISE SUCKER! Their Cutie Marks are already gone. No Alicorn magic to siphon, no power to open Tartarus and send the Princesses in.

Tirek has no choice but to let them go, since they are pretty much powerless now, and he is not strong enough yet to deal with them for good. Thus, they are safe, right up to Tirek's destruction by the Chest of Harmony. They get their magic and Cutie Marks back, and peace is restored.