There's a new Magic: the Gathering product called Welcome Deck 2016. This consists of five 30 card preconstructed decks, and has its own expansion symbol.
The webpage "Magic Welcome Decks" on Wizards Play Network says
Each deck includes 1 special rare that cannot be found in other Magic products!
But from Gatherer, it doesn't seem like that's true. Gatherer lists five rares in this product: Aegis Angel, Nightmare, Shivan Dragon, Soul of the Harvest, Sphinx of Magosi. All five of those are already accessible as rares in recent core sets or expansion sets that predate this product.
The linked page also indicates that the product was released on April 9 of an unknown year. I guess that the year is 2016 or perhaps 2015, so the product was already released. This is confirmed by the Tournament Rules which says all cards of that set are legal in the Standard format.
Does this product really have cards that don't appear in other M:tG products? If so, which cards are they?