Dear [ Rarity ],
It is my sad duty to inform you that your services as Defender of Equestria are no longer required. Your employment was terminated as of three hours before you received this notice. Do not bother to collect your belongings.
In consideration of your years of service to the former management, I have decided, out of the goodness of my heart, to grant you a most generous retirement package: an all-expense paid, permanent vacation for you and you alone to [ a flea-bitten circus on the planet Earth, at the height of the Disco Era ].
Have fun!
Sincerely yours,
D.
President and CEO of Equestria Discorporated
The [AU] tag is there because, as the above quote indicates, this story includes a pre-reformed Discord, circa late Season Two.