Dear Cici
You've really aged terribly. I mean it seriously shouldn’t be possible for immortal beings to look that much worse over time. You just look amazingly terrible.
Also, you smell like dirty diapers.
By the way, today I learned that six mortal ponies are somehow way better than you at magic. That's just sad.
Kisses, the one true king of Equestira, Discord
PS. It could be worse. At least you're not Luna.
Discord, old son, that was weak; especially by your standards, that was weak. You're going to spend a few centuries being petty about this, aren't you?
Okay, because I feel sorry for you (and that is an amazingly stupid feeling to have, really), I'll give you a clue. There is something in this letter that is completely wrong in every possible way. That's all I'm going to tell you. I pray you enjoy your imprisonment.
Heh now that's how you write a fiendship letter.