A/N: Warning, it starts dark.

Friday 20th March, 1981
9:00pm
L/N Family Manor

Thomas smiled as he silently walked up the large spiralled staircase of his ancestral family manor. He carried his youngest son, Y/N, in his arms, taking his sleeping child to his bed. Thomas loved all his three sons but there was something special about his youngest baby boy. He was the apple of his father's eye, that was for sure.

Thomas leant down with a loving and proud paternal smile and gently kissed his 18 month old son's forehead as he lowered him into his cot and smiled. It was just he and his wife in the house now that Y/N was down for the night. The house elves were in their quarters. Jacob was at Hogwarts. Lyra had organised for Dean to sleep at the Burrow and he was no doubt having fun with Charlie and his other godbrothers.

Thomas smiled to himself as he looked down at his sleeping son.

"Goodnight my little Goofball. Daddy loves you so much"

He walked downstairs towards the family room. His breath hitched in his throat though as he saw four people entering the manor's front door. A sense of terror gripped him- it was the abomination that had stalked his family for millennia, Lilith, along with three of her Knights.

Thomas quickly fired off curses as he ran down the stairs- the Knights darting behind cover.

"Is that how the Archduke welcomes all his guests?" Lilith cackled loudly. Thomas's mind was racing. Only authorised guests could get on the estate. How did these monsters get in?

He was brought back to the present shit-fight as a killing curse flew passed his ear.

"Lyra!" He screamed at the top of his lungs, his wife running out from the lounge and taking cover next to where her husband fought.

"Tom, how did they get in?" Lyra asked her husband in terror as he stood bravely, firing off spells before ducking a green curse that barely missed him.

"I don't know. We don't have time. Get up there, get Y/N and get out of here! I'll hold them off and buy you time. Get to the burrow and then to Albus!"

Lyra sobbed before she nodded and kissed her husband passionately. She pulled her wand, waited for her husband to lay down cover fire and ran to the staircase. She turned to look at where her husband fought. She pointed her wand at his back...

Avada Kedavra

Thomas L/N, the 57th Archduke of Magical Great Britain, and Lyra's husband of over a decade, fell to the floor dead by her hand. As the smoke cleared the Knights got up from behind cover. Antonin Dolohov chuckled to the unspeakable Augustus Rookwood.

"Archduke of Magical Britain. Mudblood lover. He ain't shit now!"

Dolohov walked over and kicked Thomas's still warm corpse, spitting on his face only to have Lyra's wand instantly pointed at his throat.

"His death was necessary for the ritual. He is still my husband. Lilith can always take your place maggot!"

Lilith walked over and stroked Lyra's face, gently lowering her wand arm as they stared into each other's eyes.

"Now kitten, Dolohov didn't mean anything. Did you Ant?"

Dolohov bowed and shook his head.

"No Lilith" he quivered in fear as he answered his true master. Lyra looked at her dead husband with regret.

"It was necessary, wasn't it Lilith. It's definitely Y/N who is-"

She was cut off with a hard slap to the face. Lilith's rage quickly turned to a gentle soothing tone again.

"The Demons say this child is the Prophesied One. The union of your father's line... with that one's..."

Lilith glared at the corpse of her husband's direct descendant.

"...made it clear. The boy has power, he is destined to be Adam's final heir. This ritual will pervert him. Taint him. The ritual we do will create something so powerful not even God will be able to stand against it. Never forget the true meaning of this. The Archon we create in your spawn Lyra will burn this world to the ground. The truth of this must remain between the five of us. Only you four are my elect. My acolytes. Let Voldemort think this is for his pathetic blood-purity crusade. Let the Demons believe it is to raise Lucifer. Only we know the truth. Remember as soon as the child can tolerate it you will need to abuse him Lyra. Beat him, whip him, torture him! Never forget it's his fault your beloved husband is dead. It's all that spawn's fault kitten!"

Lyra nodded at Lilith's words as the evil soulless stain continued:

"Rowle, Dolohov, get the Pentagram ready!
Lyra get the brat!"

The Death Eaters/Knights quickly magicked up a Pentagram of flames and slaughtered babies' blood on the middle of the dining room floor. Lyra emerged at the doorway holding a crying Y/N, fussy having been woken from his sleep.
Rowle leered at the boy and chuckled perversely:

"You think you're crying now you little shit!"

"Lyra place the brat in the Pentagram. Dolohov you go first" Lilith ordered.

Dolohov stepped forward, raising his wand against the innocent child...

Crucio

Lilith grinned as the infant started screaming in agony. Heavy rain suddenly fell outside, lightning flashes and thunder splitting the sky open. Lilith looked up to the heavens and cackled.

"Yes. Cry for your Prophesied One. I will corrupt your greatest weapon. This devil will destroy everything in your precious creation!"

A toddler's agonised screams filled the night air as his mother looked on unmoved.