Disclaimer:
I do not own the show. ( unfortunately )
If I did there would be waayyy more Discord episodes. ;)
Jagged note was not your ordinary pony.
She was a Changeling princess.
When (ex)Queen Chrysalis fled the Changeling kingdom once Starlight and her friends defeated and reformed her empire. She felt a stir of new life inside her. The love that King Thorax had shared impregnated her somehow, and Queen Chrysalis didn't have the heart to kill the tiny beautiful egg. So when the egg was successfully into the world , Queen Chrysalis left her with a note to King Thorax.
DEAR THORAX,
When I fled from the Castle I realised the love you gave me turned into new life.
Here she is. Take care of her since i will most likely not be able to.
Just promise DO NOT LET HER RE-FORM!
I fear as the love that she gained to be born as an egg from a reforming changeling might not allow her to reform again.
Don't find out. DON'T LET HER REFORM.
Chrysalis