It should be on your mind, too
[35] [36] Once the draft is done, players create decks out of the cards they picked, basic land cards being provided for free, and play games with the players they drafted with
Each time you cast a card like Plaguecrafter or Fleshbag Marauder, it returns to your hand so that you can play it again next turn (provided that your commander is still alive, of course)
Only time will tell, and come November, trainers will have the opportunity to explore and decide for themselves
A 7/7 for 5 mana is pretty powerful, which is why it has the effect that it does
Since your deck will be full of instants and sorceries anyway, that prowess ability can grow it into a 4/5, 5/6, or something waaay bigger depending on how many cards you can play in a turn