Yes, you keep all the cards you draft in a Quick Draft
It comes in at only two mana but can become a copy of any creature you own, assuming you exile it, so while they are only two mana, you generally want to wait to cast them until you have something big in play, like Massacre Wurm or Crabomination
Theres also the single target Rift, a mode used not often enough, in my opinion
However, the game is a little more complex in the way that you interact with various major characters, as you can increase your affinity with them and even undertake their quests
Pull rates for cool cards also arent terrible, so its not uncommon for me or someone I know to get a rare card that we want to share
The rebacked and old proxy cards can easily be identified by their weight and thickness while the blue core proxies are of very high quality and are a bit hard to identify and need to be tested by looking at the details of their printing pattern and direct exposure to light for penetrability