Twilight Metal · 8:18pm Nov 12th, 2015
Well, I got another kick going on, so bare with me on this.
One day, Discord lets it slip that he's not as young as he says, he's not a thousand-some-odd, he's old as time and space.
He also let's it slip that Equestria wasn't his first world, as a being of chaos he's spread bits and pieces of chaos across every possible reality.