Mana producing is the most important part of magic. Being able to play all your spells is vital. Some land cards obviously have more value than others. Some have less value than others: see Wintermoon Mesa . Whether or not you count these cards towards your mana ratio depends on if the card can generate mana and what type of deck you have. These are my favorite 20 lands. 20. Dryad Arbor A free Llanowar Elf is nothing to sneeze at. Though that's all he does and doesn't actually count as an elf which is why he is good, but not great. 19. Mishra's Factory One of the better lands to play in either artifact/metalcraft decks or with multiples. A 2/2 attacker by turn 2 is nothing to sneeze at and the fact that it probably won't be killed by sorceries is a nice bonus. Late game doesn't do much which is why multiples help. 18. Kessig Wolf Run Probably won't dominate any games but it does give any creature you have the ability to pump. Late game this thing wi...