Ive excluded [casthaven]Gemstone Caverns[/casthaven] (which essentially lets you turn being on the draw to being on the play), [casthaven]Urborg, Tomb of Yawgmoth[/casthaven], and [casthaven]Vesuva[/casthaven] since they dont produce multiple mana (but can when combined with lands on this list)
They buy in bulk, pick up mid-value singles, and sometimes purchase entire collections if the price makes sense
Each stadium card has its own rules
I cant recommend it, and Im not even willing to say its a cool design
The options for mana dorks that are also Allies is extremely slim, too, which only makes this card more valuable to your deck
When we're doing the Secret Lair executions of this, it really does unlock the team to go wherever they want to go with it