I Ain't Your Sacrifice
They were talking about the return of the crystal empire and bringing back king sombra.
Chapter 1- Boot Camp
Strong though bristlebeaks armies were, he had no navy, and the crystal empire stood strong against all threats from the land.
A Folly Averted
The return of the crystal empire. manipulating her into casting that nightmarish spell. we know what it is you seek, sister. and we are against it."
Nightmare at CHS Chapter 1
The crystal empire is a part of equestria right?" "true, but they are quite autonomous from our rule since distance is a factor.
Chapter Nineteen: The Summit Begins
As he was the sole military representative of the crystal empire, he seemed to cover everything. every relevant area for a short yet thorough overview.
Band Changelings Part 1
They are holding the equestria games in the crystal empire! they are looking for marching bands!" queen chrysalis had an idea... "you pondering what i'm pondering?" chrysalis said "umm, no" responded doomie.
-Future Chapter WIP-
The crystal empire was saved. sombra had made a successful return, but james and amazingly kendra managed to hold him off long enough for the crystal ponies to activate the crystal heart to power the crystal empire's defense systems to erase him.
Dr. Whooves: Chapter 6: The Insignificance of Light
"the crystal empire, twyll has told me of certain artifacts that could be of use to you." celestia looked startled. "but sombra rules there! it is rumored he holds magic that is even stronger than discord's.
Band Changelings Part 2
#2 of band changelings queen chrysalis has a plan to attack the crystal empire again, but this time as a marching band!
MLP: Believing in the Impossible - Chapter Five
Next, with a yell, she expertly chucked her weapon over the exclaiming crystal empire's rulers' heads in her little sister's general direction!
Band Changelings Part 3
"well, you did it" she starts, looking like she is about to cry "you took probably our only chance and striking the crystal empire again, and you crushed it. crushed it in to little, bitty, bite-sized pieces.
Band Changelings Part 4
#4 of band changelings queen chrysalis has a plan to attack the crystal empire again, but this time as a marching band!