Expect individual packs to be readily available at your local stores after launch, while there will be prerelease bundles available at participating stores which will include a specified foil Rare or Mythic and six Play Boosters
As a magic card, he comes with some strong abilities
Sometimes you play a typal support card that doesn't actually have the appropriate type itself (see: Grave Titan in Zombie decks), but Maskwood Nexus fixes that and assures every creature you play fits into the overall gameplan
As far as calculating the expected value of foils yourself, it's exactly the same as calculating the expected value of non-foils, except they are worth significantly more and you get significantly fewer per box
If you can manage it, the card then transforms into World Champion, Celestial Weapon, a powerful equipment
There are usually 5 Commons, 4 Uncommons, 5 Rare or Mythic Rare cards, a Land and a Token, but the rub here is that 6 of the included cards have a 'booster Fun frame' and 12-13 of them are foil
