If certain conditions are fulfilled when opening a booster pack, the next time a booster pack from the same expansion is opened, a or higher card will be guaranteed
I managed to do some horrible things with a pair of Rogue Class cards that meant every time my creatures attacked, I got to steal cards from the top of my opponent's library and then cast them on my turn
The goal with the addition of player draft is to offer a format that's more competitive, which the team feels justifies the higher cost of entry and more top-heavy prize payouts
Furthermore, it can buff your whole board something thats pretty scary when you have a squirrel army
With work, this is the most efficient board wipe available that ignores all forms of protection short of phasing
In this case, a Charizard ex [Pokmon 151] also releases in that set