Killed and served by the devil

He takes his time when he stabs the boy to death
He keeps slashing and slicing
Even after his last breath
Ill-fated gods are given praise
Whilst stabbing the infant's torso, limbs and face
Gaping wounds gushing blood and gore
Covering the pentacle on the floor
No way to die at that age
Slaughtered before his sister's eyes
Staring from the cage

Relieved,for the witch's voice
Now whispers and laughs
The killer leaves the room
But comes back with an axe
He chops up the corpses
Tosses his body parts into plastic bags
Drags them to the garden outside
To be buried in an unmarked grave on this night
The poor girl who has lost her mother
Is now forced to bury
What's left of her dismembered brother
A macabre funeral in a sepulchral garden
Buried next to the other
In the backyard of death himself

Exchanging the shovel for a bucket and a rag
She has never seen
Suck a terrible bloodbath before
Bone fragments and viscous clots of human gruel
She's forced to clean
The lugubrious mess off the floor
Asking the murder what will happen with her life
He answers
"You will serve me as my slave
Until your inevitable sacrifice
For the witch's wish and will is my command to kill"

It's dinnertime in the residence of this psychopath
A fine meal of beans, bread, meat, and some wine
Fortunately no empty stomach for the rest of the day
Then the killer has something special to say
"I saved your brother's most valuable part
Before the burial I cut out his precious little heart
Swallowing the souls of the victims
Their hearts are what I eat
Your brother's soul has now been devoured
So tell me, did you like the meat?"