The Sleeper's design - Once Upon A Time Fanfiction

A month after Regina Mills casts her final spell and becomes Queen of the United Realms, the fairy tale worlds seem finally at peace. Hope flourishes, villains are reformed, and the pages of new stories are being written.

But far from the kingdoms touched by her magic, an ancient darkness stirs.
From the ruins of Wallachia, a forgotten kingdom of monsters and magic, a terrifying new threat rises. His name is Marcus, a vampire bound to a master no one dares name. He's been creating monsters in the shadows, raising the dead, and hunting something lost to time.

Regina and the heroes thought their battles were over. They were wrong.
As alliances crumble and old enemies return, the truth begins to surface: a legendary evil known only through whispers and nightmares has awoken. And he remembers everything.
Can Regina stop a war before it begins? Or is she already part of someone else's design?

DISCLAIMER I DON'T OWN ANYTHING EXCEPT THE CHARACTERS I BRING INTO THE STORY