It is the last of the great unanswered questions. What happens to us when we die.
Thanks to Twilight's latest mistake, her and her friends now know the answer.
Twilight was NOT prepared for the other side. But then again, who is?

Twilight Sparkle has always been frustrated with Discord. His ability to do anything, with no more effort than a snap of his claw. It shouldn't be possible. His power had to come from somewhere.
Then, one day, Twilight lets slip how she feels. Surprisingly Discord agrees to explain it to her. To give her the secret to all of his powers. If she's willing to pay the price that knowing it all will bring.

It was vexing. Discord could do anything he wanted with his absolute limitless power, literally anything. How he could achieve all that with a snap of his talons had been beyond Twilight's vast comprehension.

That is, until he explained the secret, the infinite source of his abilities. It had been the single most greatest mistake of her life, to cast open Pandora's Box and see what sights were held within, never to be buried again in blissful ignorance. This was what she had chosen for herself.

Rot.

A spin-off to the the story Rot by Mister E. I suggest reading his story for context.
I appreciate the story being shared around, commented on, liked, enjoyed, all that jazz.