"Dungeons & Dragons Becoming a Magic: The Gathering Set Next Year"
Historically, unfair decks abused mana better than fair decks whether that be Storm, Amulet Titan or Krark-Clan Ironworks
(The same is true for card types that don't appear in most games, like plane or scheme.) You can't choose a subtype, such as creature types like Spider or Hero, artifact types like Treasure or Food, or enchantment types like Aura
Enter more battlecruiser and grindy and combat-based gameplay
Most notable might be the Buy-a-Box promo card Duel Decks and Commander decks, some From the Vault cards, Game Night cards, Premium Deck Series cards, and even a Planeswalker deck planeswalker
It makes sure you don't fall behind against the black-white deck, which likely has a good long game that it can use to leverage any kind of delay in your play