Chameleon Circuit

This is what we have seen, Doctor
The darkness heralds only one thing
The End of Time itself
Hey Old Man, rest your head
You're breaking down inside
Armour's cracked, set to collapse
Damn you, don't you cry
I've ended lives, I've ended worlds
I guess I've done it all
Fire, and ice, and rage inside
How long 'til I fall?
Somewhere all my darkest dreams are gathering
It's not enough to save the day
I can't escape my nightmares