Hello, so here's my theory about Abracadavre : 
 
"I can fly like a bird not in the sky 
Which can always swim and always dry 
I say goodbye at night and morning hi 
I’m part of you what am I 
 
I follow and lead as you pass 
Dress yourself in black my darkness lasts 
I flee the light but without the sun 
Your view of me would be gone" 
 
Meaning :  
 
 Samantha saying by a riddle that she's a shadow following Richtofen. 
 
 
 
 
"I can see the damage that I  
Am causing you is so benign 
You want me to be gone 
But I have just be-gun 
I am the only one “undone” 
I’m a broken miracle now 
In your head 
 
I don’t feel 
Like I am real 
But I know 
It’s all imaginary 
Are they real 
And do they feel 
Is all the pain 
Just inside my head" 
 
Meaning :  
 
Samantha knows that she's "killing" Richtofen, but that she think this is benign compared to what Richtofen did to her and her father, Dr.Maxis, she says she's a broken miracle, and that she's undone, because she control zombies, but broken because she's dead. Then she says that she think that all is imaginary, that she's not dead, and it's all a dream. 
 
 
 
 
"I am what men love more than life 
Fear more than death or mortal strife 
What dead men have and rich require 
I’m what contented men desire 
 
 
You, want me to be gone 
But I have just be-gun 
You will never know how far I’ve come 
What goes up must never come back down 
In your head 
 
I don’t feel 
Like I am real 
But I know 
It’s all imaginary 
Are they real 
And do they feel 
Is all the pain 
Just inside my head"  
 
Meaning :  
 
Richtofen saying by a riddle that he's nothing, that he know Samantha want him to be dead, but that she'll never know what he did, like the WunderWaffe DG-2, the teleporters, the zombies, and how far he survive to them, and that he will not do his downfall now. Then he say that he "know" that the zombies are inside his head, that he didn't killed Samantha, and he say all was just a dream.   
 
 
 
 
"It’s all inside my head 
It’s just inside my  
It’s all inside my 
They’re all inside my 
I see them always but they’re 
All inside my head 
All inside my head 
They’re all inside my head" 
 
Meaning :  
 
Richtofen and Samantha, saying that everything is just a dream. 
 
 
 
 
 
"It’s killing me 
To see I’m killing you" 
 
Meaning :  
 
Richtofen, saying that everytime he remember him killing Samantha and her father, he's dying of regret. 
 
 
 
 
"Death is magic 
Say 
Abracadavre 
Now…" 
 
Meaning :  
 
Samantha, saying that death is magic. (Probably because now she have power over zombies.)  
 
"You see me now you… 
Don’t cry when I am gone" 
 
Meaning :  
 
Here is an interresing step, You see me now? That means Richtofen met Samantha. I'll do a post about this meeting. I dont know if it is Samantha or Richtofen, but that explain that now : 
 
Richtofen want Samantha to be gone. 
Samantha want Richtofen to be gone 
Both will be happy if someone die. They will not cry. 
 
 
 
 
"These shackles they come 
With certain opportunities 
They won’t let me get away 
But they show me we’re the same 
We’re the same 
We’re the same 
They show me that we are the same" 
 
Meaning :  
 
BIG STEP : Samantha, saying that she got an opportunity to kill Richtofen, and that she will not be free until she do it. And she understand why Richtofen killed her and her father, because he was forced to do it. She say that they're the same, forced to kill each other. 
 
This is a big step because now, we know that neither Samantha nor Richtofen want to kill each other, but : 
 
Samantha must kill Richtofen so she can rest in peace. 
Richtofen must kill Samantha (Again) so the zombies can dissapear. 
They both have to kill each other. Sad. 
 
 
 
 
"I can’t give in 
I won’t give in 
It’s not a state of mind" 
 
Meaning :  
 
Richtofen can't die now, and he will not die, he will survive it's not a state of mind. 
 
 
 
 
"I’m wretched but I’m powerful and" 
 
Meaning :  
 
Samantha, she's undead, she's wretched between Demonic Samantha and Good Samantha, but she's still powerful.  
 
"I don’t feel 
Like I am real 
But I know 
It’s all imaginary 
Are they real 
And do they feel 
Is all the pain 
Just inside my head 
It’s all inside my head 
It’s just inside my 
It’s all inside my 
They’re all inside my 
I see them always but they’re 
All inside my head 
All inside my head 
They’re all inside my head"  
 
Meaning : Already Analysed. 
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`So, yeah, that 's my theory ^^