The stars are at war tonight
For they are losing a son - Could be a reference to how he was recently "lost" (stolen) by the Edge. Son could reference his gender.
I discovered you in a hall
You were so shiny I couldn’t resist - Reference to his shiny horn.
But you’re just a speck in the big picture
Wearing your horrific crown - Reference to his species.
I’m sorry you’ve always been second - Reference to his rank; General.
That’s why I want to make you my first