Aside from just being a good card, I think the most important impact of Traverse the Ulvenwald is how playable it makes Ruin in Their Wake
Otharri is one I played against recently, and without disenchants for the anthems and without a wrath, the deck managed to get life totals moving quicker than me when I see a spider emerge from the crack in the sofa
Kardur Goad Blink Of all the Goad commanders, Kardur, Doomscourge has the strongest "goad" ability despite not actually being goad: it forces your opponents to attack each other much like goad does, except it also affects creatures that enter the battlefield after Kardur's ability resolves, so your opponents can't play hasted creatures on their turn and attack you
But trying to fit that simple, flavorful idea of necromancy into a usable spell has created a card which not only reanimates with great efficiency, but enables all sorts of trickery due to its overlapping triggers
White alone only gets you so far, so MTG designers gave this card partner to open new possibilities with different color combinations