Having a second enchant creature on the list is clearly a sign that these decks played things pretty safe as far as two-player games of Magic go, but Grim Reapers Sprint incentivizes you to cast it at a point in the turn where you would expect your opponent to have already fired off their removal spells
There are plenty of other playables worth mentioning, but I found that cards like Teferi's Protection, Swords to Plowshares, and Ephemerate are so unbelievably good at doing what they do that the third or fourth next best option isnt really even worth mentioning
Mega Evolution adds a whole extra layer of fun to the Charizard hype, giving us X and Y-themed forms to collect in Flashfire
This deck wants to be able to cast two cards in the late game and this will definitely help
Think of the box as mini insurance
This addition created a new chase for completionists, as players could now collect both the standard and the reverse holo versions of each card