Decks that rely on fast mana, like combo decks, can go as low as 14 lands, as they make use of mana rocks like Lotus Petal or cards like Dark Ritual to add mana and cast as many spells as they can to execute their combo
You could replace the rare dual lands with some common tapped dual lands, and it would still function, but it would be less competitive because we'll have to play off-curve sometimes
Future sets might offer different flavors, like fairytale anime styles (as with Eldraine) or perhaps something more gritty or comedic
SIE NANAHARA) A4 0250 Ho-Oh ex (illus
Black didnt have a cheap and reliable removal spell like Lightning Bolt or Path to Exile before this was printed, and Push revolutionzed black removal when it was printed
Also, Pokmon BREAK cards are important for strategy in more ways than just their ability to be used in battle