Split-personality

So remarkable, such power!
Doctor, this is your final hour
Your brain's organic, so alive
I'm afraid to say that it's now mine

I know you're plan and it won't work
I'll wipe away that horrid smirk
I'll burn you up with energy
Because this brain belongs to me

You can't control my mind
I am the jekyll to your hyde
I'll defeat you at your own game
Leave me -- this isn't your domain

It's true you can regenerate
So let's call this a stalemate
We're too well-balanced to take control
Whoever takes the rest will take the whole

Winner takes it all, one final game
Of chess, meaning you could claim
Me, if you win, you can have my mind
If you don't, free the children, no one dies

You can't control my mind
I am the jekyll to your hyde
I'll defeat you at your own game
Leave me -- this isn't your domain

I know you cannot cope with gold
I was born on gallifrey of old
With eleven lives, I've had a lot to learn
Checkmate! It's time for me to watch you burn

You can't control my mind
I am the jekyll to your hyde
I'll defeat you at your own game
Leave me -- this isn't your domain