Demand, rarity, and card power level all come into play
The Collector Booster has a minimum of three Mystical Archive cards in every booster, including two foil-etched Mystical Archive cards
Flipping coins may not be the most optimal strategy, but it always adds a bit of suspense to any battle
Depending on the rest of the context of the deck, a strategy that relies heavily on having a four-drop enter the battlefield on turn 4 is going to want to play between 23 and 26 lands, 23 if the deck has a reasonable amount of ways to churn through its deck or is lower to the ground and 26 if the deck has a high number of mana sinks and plans to keep going bigger from the four-up
"They have to, at all times, retain their playability." Arita-san explained that's the one thing everyone forgets, because it's easy to get carried away when designing a card on a large digital screen
Similar to Suicune ex, the Legendarys massive HP will keep you safe while you build Arceus ex in the Bench to then KO your opponents
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