Play Boosters combine the best elements of Draft and Set Boosters into one versatile product
Classic cards such as Massacre Wurm (creatures your opponents control get -2/-2 until end of turn, and then opponents lose 2 life per creature that dies) or Elesh Norn, Grand Cenobite (creatures you control get +2/+2, creatures opponents control get -2/-2) often destroy aggressive decks, especially if brought into play earlier than normally expected
Time Walk ($2,790) THE extra turn spell, and Magic's best blue sorcery (sorry, Timetwister!)
Squall, SeeD Mercenary Squall, SeeD Mercenary supports the exalted mechanic with free double strike to your best attacking creature
If the same color cards keep coming your way, theres a good chance that no-one is playing that color so you have a better chance of getting great cards
Bloodbraid Elf Gruul isn't exactly a color that easily gives card drawing or quantity from its effects