Tldr: Play at least 40 mana sources, 46 is probably a good number
Goblin Archaeologist As I said above, coin flip cards that dont rely on the flip to provide value are often better than those that do
There's a handful of exceptions, and while I'm going to skip the "artifact matters" as it's better to discuss those individually, I have two (and a cycle) I'd like to at least touch on
Because Modern has so many fast decks, there are lots of ways you can race Infect, including more "unfair" decks like Griselbrand Reanimator and Puresteel Paladin Cheeri0s, and "fairer" decks like Gruul Zoo and Merfolk
If you want some casual MTG decks, these are super fun to play
Card not found (rare), on the other hand, won a Pro Tour in the hands of Gerry Thompson as a part of a Monoblack Zombie deck, which was able to abuse both of its abilities to gain a lot of advantage