Of course, theres always Slinn Voda, the Rising Deep, which can propel the victory
Spinerock Knoll is relatively easy to pull off in Commander and can provide you with extra cards (sort of), and Mines of Moria let you bank mana for a rainy day
Lands you control gain all basic land types until end of turn
Casting big creatures also grows this, combating the general weakness of mana dorks becoming irrelevant later in the game
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Prior to Bruvac, these two created awkward situations where an opponent was required to account for their deck size before chopping it in half