The first thing that crossed my mind was playing large cycling creatures
The addition of colored artifacts, or in this set colored prototype costs, has helped with that some, but the underlying tension for the color is still there
Ophiomancer Ophiomancer is a top-tier token generator that excels in every deck except, ironically, snake decks
Blessed Alliance This started out mostly as a sideboard tool but it is getting more popular
(It's an artifact with ", Sacrifice this token: Add one mana of any color.") Enchantment - Aura Enchantment (CTRL to add secondary) Instant Instant (CTRL to add secondary) Land Spinerock Knoll Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.) This land enters tapped
Pin trading is the same way, as was Sorcerers of the Magic Kingdom