Explore and Oracle of Mul Daya may be good at dropping extra lands, but they are not land fetchers, and they are not considered for todays list
It taps for colorless mana, but you can sacrifice it to destroy a land, an ability that becomes truly oppressive when you pair it with Crucible of Worlds or Icetill Explorer
Kinnan doesn't care about any restrictions or riders the nonland permanent put on the mana it produced
Honorable Mentions First off, as always when it comes to a list that's specific enough that it can feasibly be finished out, let's do exactly that
These are typically great uncommons that really drive you towards playing a particular color, such as build-arounds and good removal, as well as very powerful commons
Witch Enchanter Witch Enchanter is a much-needed Reclamation Sage that can also be a land