I wasnt able to contribute as much as I wouldve liked, but was fortunate to be able to hear a lot of great points and perspectives, many of which Ill share through the article
As part of the Making Magic (2003-2005) article series on the game's official site, Mark Rosewater described each color in depth (as well as multicolor cards, artifact or colorless cards, and color-hybrid cards)
To be sure you've not missed any out, this list will fill you in on all of the promo cards available in TCGP, past and present
Board complexity We don't like having common cards that make it hard to tell what's going on in play
This has kept Vaporeon relevant from its debut in Red and Blue to the latest titles like Pokmon Sword and Shield
The buyer still has to provide a card of the same rarity they either dont want or need, while the seller receives a card they can resell, repeating the process infinitely