If you're making a bunch of mana, then you don't much care about playing cards that have low CMCs
Changed Heroic Winds
Yuma, Proud Protector is a great way to draw cards and create Plant-based-beefy tokens while you use deserts
But what makes it truly formidable is its second activated ability, pay 1 and tap it to untap another target permanent
My list of cards I think are vital here include Azusa's Many Journeys // Likeness of the Seeker, Burgeoning, Druid Class, Dryad of the Ilysian Grove, Exploration, Jugan Defends the Temple // Remnant of the Rising Star, Sanctum Weaver, Song of Freyalise, The Mending of Dominaria, and Utopia Sprawl
Heck, Ravnican mechanics are often narrowthere are only ten cards with Jump-start, Haunt, or Radiance and only nine with Forecast, meaning major mechanical themes dont actually have to show up that much