Dear Luna,
Hope this finds you well. Or at all. Been a while since I sent you a letter. Twilight's beating herself up, and I think a little dream therapy may help. Not for her, mind you. For Tirek. If anypony can convince him that Twilight is sincerely offering him a chance to be free, a chance to leave Equestria and never come back, it's you.
I know it sounds crazy, but Twilight needs this. She needs a win. Chrysalis has gone completely nuts and Cozy Glow needs time she'll never get, assuming she'll ever feel remorse, but Tirek just doesn't believe parole is really possible. And if he does, and if it works...
Well, it's worth a try. For Twilight.
Your friend,
Spike