Eldrazi Ramp uses Utopia Sprawl, Sowing Mycospawn, and Icetill Explorer to ramp into Emrakul, the Promised End as early as turn three, with Kozilek's Return and Kozilek's Command as sweepers to stabilize; your plan is aggressive pressure that demands answers before they reach seven-plus mana. Obsidian Charmaw destroys Ugin's Labyrinth when it enters, setting back their ramp by two mana and arriving as a 5/4 haste threat they must answer immediately — this is your most impactful card in the matchup. Wear/Tear handles Chalice of the Void and Torpor Orb from their sideboard, the latter of which shuts off Obsidian Charmaw's triggered ability and would otherwise strand your threat. Celestial Purge exiles Emrakul or a large Eldrazi if they land one, and also handles Kozilek's Return before they can recur it from graveyard with another cast trigger. Keep your creatures wide rather than tall to minimize the impact of Kozilek's Return's four-damage sweep, and use Goblin Bombardment to sacrifice creatures in response to it.