Dear Princess Celestia,
A portal has opened in the Everfree Forest but it was closed again before I could examine it with my friends. Yet the magical energy seemed familiar to me, though I cannot recall how.
Your faithful student Twilight Sparkle
~~*~~
Dear Princess Celestia,
It´s happened again. But this time there were several portals; fortunately me and my friends were fast enough to get to examine them in detail this time. The portals lead to Canterlot High. Something terrible must have happened! Just before I was able to cross over again, the portals disappeared. I hope my friends there are well. But I also worry about what concerns the border between our worlds. I'll try to reach Canterlot High through the mirror, to figure out the reason for the sudden appearance of these portals.
Your faithful student Twilight Sparkle
~~*~~
Dear Princess Celestia,
It is terrible! The portal has closed and I can no longer open it. I've tried everything, but the really bad news is yet to come! Due to the appearance of several portals the boundaries between our world and the Canterlot High are becoming weaker. If this continues they will eventually break and our worlds will collide! I hope my friends can in Canterlot High can prevent that from happening, otherwise one of our worlds won’t exist for much longer. I ask you to prepare yourselves for the worst.
Princess Twilight Sparkle
~~*~~
CRACK
Oh no! It´s too late!