If your deck does not have access to green, you might have to get more creative by using cards like Tithe, Pilgrims Eye, or even Demonic Tutor to put lands into your hand, cards like Mana Geyser, High Tide, or Caged Sun to get a big payoff, or mana rocks like Arcane Signet, Coalition Relic, and the Ravnica Signet cycle (Boros Signet, Izzet Signet, etc.) to speed things along at the risk of seeing them destroyed later
Uro is a strong land commander and can be a nice way to generate some card advantage and get extra landfall triggers
I don't remember any specifics and I'm a bit too lazy to look it up, but there are a bunch of cards in White called Mesa Unicorn or whatever, right
Notable Cards: Reprints and $$ Notable reprints come in the form of Solemn Simulacrum with cool new art and the same wonderful abilities that make it a staple in almost any Commander deck
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