(First things first: Even though this story is a sequel, I put a brief recap in the first chapter, so you don't have to go back and read the first story if you don't have time.)

The Elements of Harmony and the Avengers wanted a better way to communicate than sending Thor to Asgard to get the Tesseract and then using it to go to Equestria. Twilight had an idea: Magic journals!

A chapter for each movie that would realistically be written about--skipping Ant-Man, GOTG2, Doctor Strange, and Black Panther, because none of the Avengers would have seen those happen.