As the first set of any trading card game, supply was not able to meet the overwhelming demand of the game, making sealed products tough to find at local game stores at launch
But the real anti-casting cards in Gruul have to be the artifact and land destruction
I'm not 100% sure where it came from, but I have to assume it was designed top-down from the creative side
And that, really, is Modern Masters 2015 in a nutshell
restricting the spells your opponents can cast and the creatures they block with is unique
From playing with the heroes such as Yuna, Wakka, and Auron, to even finding uses for the minor moments such as the traveling shopkeeper Oaka constantly asking you for money (though in MTG hes after your counters to exchange for drawing more cards)