An intro song to the story, no it is not Children of the Night but just as foreboding.

Symphony of the Night Series
Book 1 - Book 2

My son, the day you were born the very forests of Equestria whispered the name. Dracula.

My child, I watched with pride as you grew into a weapon, of darkness.

We both have stared into the Abyss itself, and lived to tell the tale.

And I know when we meet on the field of battle that you will show no restraint when exercising your great power.

But the truest victory my son. Is stirring the hearts of your comrades.

I tell you this, for when my days have come to an end.

You shall be the Lord of Shadow.

This is not the Equestria you know. This is not one where friends and happiness filled the land with no sense of darkness. No sense of true dread and terror. For their must always be a darkness to face. Though there are great similarities, they are not the same.

This is an Equestria where it is engulfed in fantasy and magic. And that some legends are not always embodiments of good. In this book there lives two societies, the Children of the Day that would live peacefully and happily. But there lives deep within the Everfree Forest the secretive Children of the Night, ponies of darkness and mystery. This is a tale of shadows, tragedy and blood. Bonds will be broken and friendships will be tested, the beginning story of the Symphony of the Night Series.

Edited by: Senyu

Update: With Children of the Night finished I have a few one off adventures to read set in the same universe.

List:
Children of the Night Epilogue - A Silent Dawn

Blood of the Dragon

Ties That Bind