I'm not sure if that was the origin of the chorus also, but it's quite possible. The chorus for "Ghosts" is
Sworn under an oath to war

One of the games in this show was called "Superheroes," in which the participants all pretended to be bizarre superheroes battling a terrible enemy. For example, in episode 228 the enemy was dry skin.
Drew would normally sit behind the desk during the Superheroes game, but recently he emerged from the desk, sworn under an oath to war. Or perhaps he was still sitting behind the desk, I don't know. Regardless, Drew started tweeting. Here's a tweet that caught people's attention:
I bid $25k for the @Drew Twitter handle.
This was in response to Drew Olanoff's announcement, shared through Mashable, that he would auction off the aforementioned @Drew Twitter handle, with the proceeeds from the auction going to the LIVESTRONG Foundation.
But Drew Carey didn't stop there. Eleven minutes later, Carey tweeted:
@Drew I'll up my donation to LIVESTRONG to $100k if I get 100k followers by Nov 9th. I have just over 13k followers now.
Oh, and in case you haven't heard, Drew didn't stop there either. No sir.