Plus it'll have other (don't worry, not TOO big) ramifications.
One, Lucas will have to do some MAJOR soul-searching now (as, until now, she was pretty sure her sword was perfectly common among angels of vengeance).
Two, Cass will raise an extra point, one that's VERY practical from a sociological point of view (remember her specialty) about why Lilly and Jenny must be saved.
Three, unless I'm sorely mistaken (and I'll ask for your blessing on this one), Selene will have to explain to Lucas who exactly the Enemy is - at least so far as the gods know. This being an enemy that's focused on creating "order" (by imposing an orderly non-existence, seemingly - again, correct me if I'm wrong), I'll try and make sure Lucas's reaction is as priceless as it should be. :p