I'm not here to discuss what a move like this means to WOTC, or even speculate on their reasons for putting this kind of policy into place, but it's important nonetheless to demonstrate how this would affect the market for consumers
Marcy: This card got a lot of play in the Bloomburrow pre-release and preview content that came out, and for good reason: it makes Lizard typal Rakdos work VERY well, allowing you to filter your deck very, very easily and find exactly what you need
Portal to Phyrexia ( MC, ETB ) - In a deck that wants to ramp out large threats anyway, you generally will wind up being able to get to 9 mana
But before you do that, lets consider how many colors you want to play
Take a look: Just looking at the older cards, I can see the difference in the border size when compared to newer ones
Each color gets a strong, four-mana, cost-reducing artifact with a six-mana activated ability