Their deck leans on Oath of Druids and Sphere of Resistance, so Uktabi Orangutan gives us a proactive answer to Sphere of Resistance (and Mox Diamond) while still being a creature body. It can't touch Oath of Druids, since its enter trigger only destroys an artifact. Nantuko Vigilante stays in the deck because turning it face up can destroy Oath of Druids as well as an artifact. Ravenous Baloth is a strong top-end threat. Their removal is mostly Swords to Plowshares, which can still exile it, but we can sacrifice the Baloth in response to gain 4 life, and that life also helps offset Terravore races. We trim one Arrogant Wurm and the Squee, Goblin Nabob, since both are slower and lower impact here. Keep Wasteland and Windswept Heath as is. Their deck also plays heavy mana disruption, so our own land base needs to stay intact to compete on resources.