"What have I done to you, dear sister?"

Celestia reads Luna's diary to know what its like to live alone for a thousand years. But to her surprise and horror, Nightmare had relapsed into Luna for months at a time.

Read the entries of the over-hammy villain Nightmare… and a scared Luna as she tries to live in isolation.

"It's cold up here. And lonely. Surely, by the end of a year, I'll be welcomed back."