Packs are collated so that you have a standardized amount of colors in each pack. Writing this here because it took a long time and help from my girlfriend to figure out how to make this work and for reference:
2 slots each pack for White, Blue, Black, Red and Green. That's 10 cards in each pack.
The remaining five slots are (ci=c OR ci>1). In words that's colorless cards or cards with a more than 1 color identity(multicolor cards)
Grid drafting is a strategic 2 player draft with completely open information.
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