You have poured hours into your designs
Given how rare creatures with horsemanship are, this card mostly reads as Rolling Earthquake deals X damage to each player and each creature. The unintended ability to damage and destroy flying creatures sets this apart from many other similar cards
If The Wandering Minstrel would enter the battlefield at the same time a land you control would enter the battlefield tapped, that land still enters the battlefield tapped
Unless you specifically want a deck filled with Basic Lands for some reason, and yes, there are reasons, you should have a Command Tower in there
Discover the Formula at first glance seems like its a bit expensive
Trystan's Command Trystan's Command gets you either another of your best elf, grinds your opponent on value with a double Regrowth, removes one of their best cards, or trades the trample on Overrun for a team-wide untap to grant tons of value or straight up wins