Talk:Twilight's Kingdom - Part 1/@comment-10390252-20140507063151/@comment-24908786-20140507113613

My guess is that is what happens: Tirac grows stronger with every pony he siphons the magic and Cutie Mark from, until he was strong enough to go after the Princesses, but when he sees they are already blank flanks, furious at having been denied their magic, he thrusts them into Tartarus to be kept as his hostages until he finds the pony carrying their magic and gets them to either surrender the Princesses' magic, or never see the sovereigns again...only to then get zapped and be vaporized forever.