Modern Horizons 3 contains the 5 basic lands (Plains, Island, Swamp, Mountain, and Forest) with variant treatments, plus an uncommon Snow-Covered Wastes (included as one of the 101 uncommons) with its variant treatments
There aren't many ways to bring permanents back from the graveyard once they're removed, so once something is gone, it's likely gone for good
Running an Evolving Wilds to get a tapped Mountain means you cant cast the Harnessed Lightning until your next turn
Commanders such as Tymna the Weaver and Winota, Joiner of Forces will love the tokens too
By the time Howler comes down for four mana, you should already have at least two cheap creatures that can discard cards in some capacity down on the battlefield, ready to immediately do just that and swing in for huge damage in addition to drawing you two cards