The answer is that you are guaranteed to open not only four rares / mythics each pack but also four special printings, with each collector booster pack offering one foil-etched rare or mythic, one alt-frame rare or mythic, one sketch or borderless rare or mythic, and one extended-art rare
Cards that could potentially fight back, like Thalia, Guardian of Thraben, just can't be played because Bowmasters destroys them instantly
All sagas gain a lore counter each round and activate a different ability, and the card expires once it reaches its max number of counters
It is also available in regular, foil etched, and borderless versions
The deck is rounded out with card selection for consistency and Temporary Lockdown to fend off aggro decks
However, as people have figured out how to draft the format better Im finding myself with less playables