Yes, yes, 1000 times yes!
Since the beginning of Kaladesh block, I’ve gotten 4 mythics. Three of them have been Architect of the Untamed
(Alternate suggestion: mythics are hard enough to get as it is; just don’t give duplicates! Seriously, I’ve been playing for over a year and I don’t even have ¼ of the mythics, but I’ve gotten at least a dozen duplicate mythics
)
I love the idea of not being able to receive a duplicate of a mastered mythic for the reasons stated. Another spin would be to create some logic that reduces the likelihood of drawing the same card. I play many games that had this in effect before. It helps keep engagement, and promotes purchases.
I dropped $100 on a red pack. I got 2 kozileks returns for my money. Sadly,i already had those. If i had received 2 new mythics, i would entertain the idea of dropping another hundred. Just how i feel.
We had this discussion in our coalition some weeks ago.
We all agreed on this, at least for mythics you should get 30-50 crystals.
But the suggestion with no duplicate mastered cards is also good, but I would say getting a siginificantly lower chance (like 10-20%) of getting duplicates of mastered cards would be best. Because I master all my cards in the first story mission without even paying attention to the game (watching tv while doing this), to get the color mastery, so there is no real challenge in mastering cards. That’s why I think completely eliminating duplicates would be a bit too easy.