In Commander, removal is necessary for survival, but there are so many options across all five colors
Discard Spells Thanks to a reprint in Theros , Pioneer has access to Thoughtseize, one of the best discard spells ever printed
However, you will neeed to have out Nim Deathmantle, a sacrifice outlet like Krark-Clan Ironworks and/or Ashnods alter
Zul Ashur turns your graveyard into a second hand, making it an engine piece for grindy zombie decks
Are you satisfied with the changes, or were you hoping for something different?
As such, while the mana base is fine if you are a brand-new Commander player, if you already have a Commander collection of any size at all, you probably already have all of the lands that Commander 2018 has to offer