First, when you cast a creature with the mechanic, as an additional cost, you may pay the Squad cost (that number written next to it) as many times as you like
Its a pioneering step in creativity, and whether Carly realizes it or not shes opened the door to a lot of future artists with her two Mystical Archive contributions, regardless of what social media might shout into the void
The closest I could find to anybody doing it in the mainstream recently was Artifact (I know, I know, I'm stretching the word "mainstream" here) with a slightly bastardised version of the concept handled via Steam's marketplace, and even then it's still an online auction house, not just doing fun swaps with your pals and saying "well I've got this, what've you got?", like exchanging the best parts of your packed lunches at school
While this technically doesnt leave tons of room to make your money back, value isnt really a concern for these drops
It reduces the mana cost of creature spells of the chosen type by 1 and gives you a chance at the beginning of your upkeep to look at the top card of your library and draw it if its a creature of the chosen type
