Essence of the Wild

Commander is where Essence of the Wild actually gets to do something, because the format's slower clock gives you time to reach six mana and the singleton rule means opponents rarely pack the density of cheap removal needed to answer it before it spirals. In Legacy and Vintage it's a non-starter — six mana for a creature that doesn't impact the board the turn it arrives is a concession speech in those formats. Modern is technically legal but practically irrelevant for the same reason; the format's too fast and too efficient to let Essence of the Wild live long enough to matter. Oathbreaker sits closer to Commander in pace, and the right signature spell can make the copy-replacement effect explosive, but the pool of legal planeswalkers that synergize with it is narrow.