Someone likely already built a deck where the entire mana value of all the cards in the deck combined is just 13, so its impossible for them to overshoot
The Amethyst and Steel starter deck is a combination of strong cards and magical cards, with the two foil cards being Merlin-Shapeshifter and Tiana - Celebrating Princess
Personally, my favorite way to win is looping Gray Merchant of Asphodel
Your wallet used to be a reasonable answer, but even that isn't really the case anymore when it comes to the options available to get you all your colors
This allows Vesuva to potentially function as a second copy of another key land such as Cabal Coffers, or simply allow a player to gain access to the same useful utility land an opponent may be using
Get to know what's in the box, and even the lines of play, with this guide