Terrageddon threatens to blow up your mana base with Armageddon after establishing Treetop Village and Wasteland advantage, so Naturalize and Uktabi Orangutan give you outs to their Mox Diamond or a resolved Sylvan Library that's fueling their plan, with the Orangutan also providing a relevant body. Cut Elvish Spirit Guide and Squee, Goblin Nabob since neither helps you rebuild after an Armageddon and you'd rather keep mana sources online. Your Birds of Paradise and Wall of Roots are valuable Armageddon insurance since they can rebuild board presence without needing more lands. Focus on developing your graveyard/reanimation plan quickly before they can strand you on a low land count.