The most potent mode is by far and away the Unearth effect which despite hitting smaller dorks, gains huge value from the instant speed
It's whether your storage outlasts your cards' next quarter-century
The gist is there is a lot of dancing around, aiming not to lose a bunch of ground to a Chandra or Glorybringer deal-four while also aiming to not run your Chandra or Glorybringer out in a spot where it doesnt get to do that
Tron Lands The staples of colorless decks everywhere, Urza's Tower, Urza's Mine, and Urza's Power Plant are collectively known as the Tron lands (a reference to Voltron, a cartoon where various robots combine to form a single stronger mech)
But Shroofus can also work as a sneaky Voltron Commander since one big hit from a powered-up Shroofus can flood the board out of nowhere
Theres an argument for putting the elves in this slot solely for having better creature types, but the mana fixing that Birds offers is incredibly powerful