Although earlier expansions would go through some growing pains (particularly 'Legends') in trying to figure out colour identity, a lot of the cards printed have been very good at trying to match the colour identity both flavour-wise (what the card art and name depicts) and mechanically (what the card does in the gameplay
While the deckbuilding restriction wont let you put every multicolored card you might want into your deck, Magics card pool is large enough to make it trivial
Along with that, I also have a Modern folder
How cheap are they going to get
[78] Other games also influenced the design at this point, with Garfield citing games like Cosmic Encounter and Strat-o-matic Baseball as games that differ each time they are played because of different sets of cards being in play
For example, the character Scorpion (Mac Gargan) has the Scorpion creature type in our set because he canonically got some of his powers from an experiment involving scorpion DNA