Yes - but it should be very hard to get, just like they were intended to be.
Zanz wanted to have a "truly" Rare card, since the current Rare cards are no longer, er, Rare thanks to T50 farms. He thought up of Nymphs, but I personally think restricting it to ~once a month from Oracle to be way too restricting.
It should not be able to won from any form of "PvP", including T50. (the Relic system takes over) I think certain FG's should have a very, very small chance for you to spin one from them - but it shouldn't be in their decks. If level 5's aren't changed, then they should pack a decent chance of getting Nymphs, too. (kill two birds with one stone) The approximate chances of getting a Nymph from this method should be about the chance of getting it from Oracle - maybe once-a-month (using, say, a decent FG-killer), perhaps twice-a-month for level 5.
EDIT: I forgot about tournament win. But people who have never been on the forums or cannot use forums for whatever reason (horrible English, hate forums, co.cc websites blocked, etc.) should have some sort of fighting chance.