Mana curve refers to the literal shape of your deck
A well known fact, from the days before you had to play with sleeves, was also that the first printings of Mirage was far more glossy than other sets (same with some printings of Antiquities), which made Mirage lands sough after by semi-cheaters who wanted to be able to see if the top card of their library was a basic land
Generally probably just going to be a value play, though there might be ways to manipulate the tokens and keep casting the same spell over and over, like some sort of Dualcaster Mage loop, because of the counters it would get really complex
Just play an Aluren, slap down Wirewood Savage for free, and then repeatedly play Cavern Harpy
A common dual land appears 50% of the time
Do my justifications make sense