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
Running an Evolving Wilds to get a tapped Mountain means you cant cast the Harnessed Lightning until your next turn
It's one of the best reanimate targets, at least considering the Standard format
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
Once done, it returns to the front side ready to start over
Commanders such as Tymna the Weaver and Winota, Joiner of Forces will love the tokens too