Eight lands in play is the break-even point where you can cast this for free, though you could always run it out earlier, hope it sticks around for a turn cycle, and untap with something like 10 to 12 mana from lands alone
But, when it comes to assessing the value of these cards, it's not always about their power or which card sees the most use in player decks
Each Play Booster contains 14 Magic: The Gathering cards and 1 Token/Ad card, Helper card, or Art card
Weather Maker has all the makings of a very good shenanigans card, in addition to the mana generation it offers
This deck is all about dropping a huge beater and then smacking your opponents to death
The Minstrels Ballad At the beginning of combat on your turn, if you control five or more Towns, create a WUBRG 2/2 Elemental creature token