Lying in Black

I hear piercing cries
from the girl -lying- in black
and I ignore her

Who used Who?

Once upon a time
He walked a golden road
Then this dark stranger appeared
he offered a deal to the boy

Open this box
and accept
this forbidden power
accept it into your veins

What, when...why???
But he never said
The boy opened the box
finding his superiority

He ignited
his funeral pyre
and sadly enough
I helped