First, if you missed on the top seven cards, you were definitely going to miss on two or four cards
While this may not seem like much at first, if a second land enters the battlefield under its owner's control, its controller adds four mana to their mana pool
When playing a mono green deck in MTG, having green card draw is very important
There are four versions of Overlord of the Hauntwoods, and all four of them are also some of the priciest cards in the set, with the extended art version as the 29th most expensive cards in the set
Well of Lost Dreams is the best of these options : any time you gain life, you can pay any amount of generic mana up to the amount of life you gained, and draw that many cards
However, Phyrexian Tower can be useful in just about any black Commander deck, as it always gives you an option to trade in a creature for a quick mana boost