Discord: Blue really is my color, don't you think?
Penny: ...Tell me why, again, I had to take you shopping before you tell me what's going on?
Discord: Because nothing's free, Pippi Slutstockings. Just because you can't see the price tag doesn't mean it's not there.
Penny: Sure, whatever. Now that I'll have to work overtime for the next two months to pay off my credit card, are you going to tell me what's going on?
Discord: Sure. Saturn came from the future to change the past. I came back to stop her. That's pretty much it.
Penny: I figured that part out. Why?
Discord: It's a family thing. Saturn wants to kill my other sister, Aries, but she's not allowed to. Therefore, she went back in time to prevent her from being born.
Penny: Then this is all, what, some sick case of sibling rivalry? Why involve me?
Discord: I don't know. You were convenient?
Discord: Saturn's all right, she just goes a little berserk when Aries is involved. See, Saturn and I share a mom, and Aries and I share a dad, and Saturn thinks that without Aries, we'd be a normal happy family. I love both of my sisters, so I came back to stop her.
Penny: Ok, whatever. I really don't care about your whole weird Jerry Springer family, just tell me: Does Nightshade ever rule the world, and do I stop her?
Discord: Oh, yeah, Nightshade totally rules the world. She was still ruling it when I came back into the past, and I left after Saturn, so I'd say... no. You don't stop her.
Elsewhere...
Belladonna: ...at which point we knock her off, throw her body in the shark tank, and resume my former operations for world domination.
Belladonna: Any questions?
Roxy: When do we start?
Belladonna: Tonight.