Everything about this version of Mox Amber is unique, from the flavor text to the fantastic art from Steven Belledin
Changing the count of each rarity of card youd expect to see when you open a booster, introducing more variance in slots, adding in more outside cards, all impact how the set plays and thus requires us to change how we build the set, he said
The 'Standard' format was created to reduce the game's overall power (as well as entry cost) by limiting the legal cards to those from the last 4-8 sets
I would have these above the Check lands if there were a full cycle on offer in the ratings
Huge credit to the Theros design team for this, because they were able to turn that into the solution god cards had been waiting for all along
It no longer lets you cast every spell at instant speed, but that allows us to make cooler cards at better rates