By doing so, they provide an additional mana one turn earlier than the benchmark set by Rampant Growth
So you're encouraged to play cards that cost 3 or more, and it's a complicated puzzle to balance with creatures to target, high quality spells that target, and have the ramp to do them
Even the Fallout Universes Beyond decks only had 53
A play set is defined as possessing four duplicates of a card, given that you're allowed to incorporate up to four copies of any card in your deck How can I get specific cards I want
To me, its a good sign when I look through my players sideboards after a draft and see cards that could, if the draft had broken differently, have been exciting and powerful cards in different decks, rather than just the least powerful cards in the cube
Other than being a permanent (as it can be put onto the battlefield), we don't even know what kind of card it might be