Trixie watched idly as Twilight enchanted their bags with spell that would preserve anything kept within them. There had been some long winded explanation about the bag freezing time within themselves, and Trixie had wanted proof of that, but had been told that the spell ended as soon as the bag was opened again, and resumed when it was closed, so she had no way to tell if it worked or not. She only had the assurances of Twilight that it did.