Llanowar Elves and all the others (Fyndhorn Elves, Elvish Mystic, etc) do a good job of ramping your green mana, but there are actually some other great options at 1 CMC for mana making that aren't these traditional mana dorks
Landfall abilities flock together, sure, but the Plant tokens Phylath, World Sculptor gives you are excellent sacrifice fodder
There aren't many commanders that can cheat cards like Omniscience into play from the top of your library
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Also i can use Consume Spirit + Culling the Weak to get some lp and destroy creatures Suggestions Updates Add Comments Attention
Youre essentially paying an extra UR to tack Amass Orcs onto your next Instant or Sorcery, although getting to dig a bit into your deck to find that spell is definitely valuable if you dont already know its on top