Although it does include fewer cards - 12 instead of the usual 15 - in it you can find more rares, more art styles, and even chances to find things from older sets thanks to The List.If you want to crack packs or find some good cards for your constructed deck, and have no interest in playing Draft or Sealed, then a Set booster is the way to go
For completeness stake, I should note that it possible to win with Ancestral Recalls, but to deck the opponent you need to cast about 11 Ancestral Recalls without allowing the opponent to be able to take advantage of the card advantage
The ramp mode pushes explosive turns earlier than opponents expect
As much fun as I had playing Mountain tribal (Scapeshift) this weekend, there isnt too much to talk about there
The most common use is to put an infinite number of counters on Animar, Soul of Elements
This creature not only makes your instant and sorcery spells cost one less to cast, but by sacrificing it you can copy the next instant or sorcery spell you cast that turn - and not just once, but for each time you've cast your Commander from the command zone in that game