Main board cards are cards I would love to get at some point. Side board cards are cards I'm thinking about and don't want to
forget but don't necessarily want exactly at the moment. I know I could create a different deck but I don't wanna. That leaves the Maybe board, which are cards that if you're looking to purchase some cards as a gift, feel free to
consider the maybe board as options - the main distinction is very minimal between main and maybe. Maybe is just more of a, "Hey if I get this card I have an idea of what I could do with it - perhaps a new deck or something," whereas the main board is more cards where I know where I'd put them or I just really like the art and therefore I need.