After you've tried those basic rules, there are plenty of ways to play, so finding a format that you enjoy is really important when first learning about Magic
This isn't going to be a staggered release
7 Robin Hood: Champion Of Sherwood Card Number 190/204, Steel Ink Robin Hood: Champion of Sherwood has the Shift mechanic, which means he can be played on top of another Robin Hood or Morph card for only three ink, although even at five ink, this card is a steal
If one in 100 Collector Booster packs has a serialized card (Wizards has said its a worse chance, without being specific) then that means every eighth box ought to have a serialized card
The strength of elves is a combination of their ability to flood the board with creatures and generate tons of mana, which can then be filtered into card draw or some sort of game-ending board pump effect
If you simply cast this spell from your hand for 3 mana, it will deal 2 damage to each opponent and each creature they control