"Dear Thorax..." Spike began. He thought of what to say next, it had been almost three moons since he'd last seen his changeling friend and he was writing for the first time. Suddenly, a memory of a moment they had before Spike left the Empire resurfaced, giving reason for him to continue the letter. "...what did you want to tell me before we left the Empire? You said it was important to our friendship?" The succint letter was all that was necessary for the moment. Spike inhaled, released a puff of green fire, and sent the letter off before receiving an almost immediate response. He began to read aloud out of sheer force of habit.
"Dear Spike,
I'm happpy to hear from you again. However I would much more favor telling you in person, luckily, Princess Cadence is inviting you to visit! I'll tell you when you arrive.
From, Thorax"