Obsidian Charmaw is a strong include here: it costs less for each land they control that could produce {C} (Eldrazi Temple, Ugin's Labyrinth, Urza's Saga and more), and its enter trigger destroys a nonbasic land such as Urza's Saga or an Eldrazi Temple while leaving a 4/4 flier behind. Brotherhood's End is run in its artifact mode, which destroys all artifacts with mana value 3 or less. That hits Vexing Bauble, Haywire Mite, Soul-Guide Lantern, Springleaf Drum, Talisman of Resilience and Blade of the Bloodchief, plus any Construct tokens from Urza's Saga, without touching their bigger Eldrazi creatures. Don't choose the damage mode unless you can afford to lose your own small creatures, since it hits every creature. Rest in Peace is a real include, not just insurance. Emrakul, the Promised End gets cheaper for each card type in their graveyard, and Shifting Woodland's delirium needs four types there, so exiling their graveyard slows both. Malevolent Rumble also stops filling their graveyard, since the cards it would bin are exiled instead. Stubborn Denial and Spell Pierce are weak here because their key threats, Basking Broodscale, Sowing Mycospawn, Emrakul and Devourer of Destiny, are creature spells, and both counters only hit noncreature spells. The noncreature spells they can hit, like Ancient Stirrings and Malevolent Rumble, are cheap, and their Eldrazi Spawn tokens, Temples and rocks make it easy to pay the tax. Sowing Mycospawn's land search also triggers on cast, so it couldn't be stopped that way anyway. Focus on racing with efficient creatures and use Brotherhood's End to clear their cheap artifacts and Construct tokens.