Each Value Booster contains 3 commons, 2 uncommons, 1 wildcard of any rarity, and 1 card that may be a land, a traditional foil, or a Special Guests card.
You can obtain the Cosmog (1-Diamond rarity) card by opening Deluxe Pack: ex from Deluxe Pack: ex set
Japan frequently puts out promo cards, special sets and limited editions that never receive an English printing, and these exclusives can become incredibly sought after over time
Or maybe you want the Elven Council deck, and force your table to do a whole lot of voting
When hexproof was introduced in 2012, there was no real need to keep producing shroud cards
This deck was completely built by myself and is not a pre-con