you also get a copier effect for six mana, thats repeatable every turn
Biogenic Ooze - Not only does this make a token when if flickers, but it also makes them all bigger over time, and can even make more tokens even if you don't have flicker options
Commander preconstructed decks have been notorious for having far too many taplands once they go above two colors
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