Skulduggery pleasant fan book

Let it go the sequel

Ok. So this song is set not technically within the series. She is becoming one with darquesse instead of darquesse taking over. And it doesn't really work if it happens in the same way as in the book. I dunno. Read it and sing it and then maybe you can suggest an storyline that would allow this to make sense. maybe i could even write a fanfiction!
Anyhoo...

The blood glows red everybody is dead
Not a surviver to be seen
A kingdom of isolation,
And it looks like I'm the queen.

The their souls are adding to swirling dark inside
Couldn't keep her in, heaven knows I tried!

Don't let them in, don't let them see
Be the good girl you always have to be
Conceal, don't feel, don't let them know
Well, now they know!

Let it go, let it go
Can't hold her back anymore
Let it go, let it go
Turn away and slam the door!

I don't care
What they're going to say
Let the darkness rise,
The power never bothered me anyway!

It's funny how some power
Makes everything seem small
And the fears that once controlled me
Can't get to me at all!

It's time to see what I can do
To test the limits and break through
No right, no wrong, no rules for me I'm free!

Let it go, let it go
I am one with the beast inside
Let it go, let it go
You'll never see me cry!

Here I stand
And here I'll stay
Let the darkness rise!

My power flurries through the air into the ground
My soul is spiraling in shadowy tendrils all around
With one thought they crystallise into a deadly blast
I'm never going back,
The past is in the past!

Let it go, let it go
When I'll rise like the break of dawn
Let it go, let it go
That perfect girl is gone!

Here I stand
In the dark of night
Let the darkness rise,
The power never bothered me anyway!