Decided to give 15.ai a go, I swear those vocals took longer to do than the entire rest of the song. Originally posted to T:EM/P/O thread 61 on /mlp/
Download: https://www.mediafire.com/file/rg1bm9hk9p1aigv/Goddess.wav/file

Lyrics:

Twilight, my pupil
You will succeed us soon
Twilight, our princess
It's time you knew the truth

A millennium we've ruled here
Raising moon and sun
The secret, to eternity
Lies deep within the blood


As our charge will soon conclude
We pass this knowledge unto you
To postpone the imminent final rest
Give tribute of bone, consume the flesh

Reap the pastures of earth and sky
Choose the souls to sacrifice
Inhale the fragrance of the incense
Consume the life force flowing hence


The moon is waning, the time is near
On the altar place those held dear
Spill the blood and have no fear
Of this royal formality

The sun is rising on your rule
This is the thing that you must do
Before each year's solstice is through
Achieve your immortality

Come my pupil 
You must fulfill
The duty you've been beset
Come young filly
Burn the lillies
You are not a goddess yet 

Come my pupil 
You must fulfill
The duty you've been beset
Come young filly
Burn the lillies
You are not a goddess yet 


Now you know the secret 
Of our eternal life
Godhood comes not freely 
But at the cost of a life

It is your right to use them this way
There is honor in this kill
After all they are your subjects
and subject to your will

Princess i cannot do this
These ponies are my friends
I could not use them for my own gain
I will make sure this cycle ends

This is the law of nature
Without us everything will cease to be
No light or dark, no living or death
No existence in the land you call home, and would see set free


Come my pupil 
You must fulfill
The duty you've been beset
Come young filly
Burn the lillies
You are not a goddess yet

Come my child
Show a smile
Do your job with no regrets
Come young pony
Nothing comes free
You will be a goddess yet

Come my pupil 
You must fulfill
The duty you've been beset
Come young filly
Burn the lillies
You are not a goddess yet

Come my child
Show a smile
Do your job with no regrets
Come young pony
Nothing comes free
You will be a goddess yet