The most expensive Mewtwo cards show a gradual evolution not only in Mewtwos design and posing, but indeed in the design of the card game itself
Art by Filipe Laurentino
Though JJJ suspects only one creature when he enters, there is generally no limit to the number of creatures that can be suspected
Regardless, I dont know that now is the time for more than 60 cards, but I do know that as the card pool expands, it gets easier and easier to find more spells of a similar power level, but no other lands are close to the power level of fetchlands, so the incentives to build to maximize the power of our lands over the power of our spells do increase in some way over time, which is to say that, even if its not right now, it could be someday, and getting there first might be the best way to truly break Modern.
I've made attempts in the past, but none of my first drafts ever met my personal standards at the usual price range of ~$50
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