I wonder if any of the other cards here can take advantage of a 7/7
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For example, when you take your beginning phase, you'll have an untap step, an upkeep step, and a draw step, and then the next player in turn order will take their beginning phase
Commander players often dont pack much in the way of graveyard hate, so Im all about cards that can come down early to deal with reanimation targets and the like and then provide a big upside later in the game
The pros being that it is a creature that can potentially have an Indestructible counter on it that can attack and block
However, assuming that you're building a fairly typical deck, there is a really simple way of figuring out about how many lands you should put in your deck