Boxes actually hold about 1,140 Magic cards, as MTG cards are thinner than baseball cards and those boxes were named after the number of standard baseball cards they hold
WotC considers the mechanic a failure, as evidenced by this quote from head designer Mark Rosewater: The idea of the mechanic was great
Lets start by recognizing the battles range, including their in-game cost to play, also known as mana value, and the effects they provide for that cost potentially the most critical threshold to establish, since a large part of effective deck construction is maximizing the return on your mana investment at various points in a games early and late stages
For an aggressive deck, mono-green has a lot of staying power: Icetill Explorer lets us play more lands, Sapling Nursery creates 3/4 tokens, and Earthbenders Ascension keeps adding more +1/+1 counters on creatures
It does bear some similarities to its predecessors, with a smiling Pikachu holding up a silver trophy, set against a silver background