you can go for a mono-white good stuff deck
Banquet Guests cast into a board with four food tokens would cost WG for an 8/8 that can sac food to gain indestructible until end of turn, marking it as a sneaky Hogaak variant in this build
However, you can consider playing fewer than four copies of a card if: It gets worse in multiples (such as legendary creatures) It's only useful against certain matchups It's a win condition, and your control deck will have time to dig through the deck and find it You're stuck choosing between two cards which have equally strong, similar, but slightly different effects (you could play two of each) It's a slightly worse version of a card you have four copies of already, and you're including it because you want even more of that effect
This could lead to some sort of combo deck with Paradoxical Outcome where you are able to cast a lot of cheap artifacts and draw tons of cards thanks to Jhoira, Weatherlight Captain
Looking at the current metagame, it seems that Modern is moving away from broadly useful cards, and leaning into sideboard haymakers
The blue part of Gretchen gives you access to counterspells and extra card draws to see your key cards quickly
