This matchup is a race and an artifact/enchantment battle: their manabase is full of colorless value lands (Eldrazi Temple, Ugin's Labyrinth) alongside Urza's Saga, which is an enchantment land, so Force of Vigor can target Saga as well as Blade of the Bloodchief or a stray Vexing Bauble. Masked Vandal gives another body that can exile a problem artifact on entry while advancing our board. Keep Haywire Mite in mind but it's low impact here since their key threats (Devourer of Destiny, Emrakul) aren't artifacts or enchantments. Prioritize going under them with Cauldron Familiar/Carrion Feeder loops before they assemble Devourer of Destiny plus Kozilek's Command lockout.