Eldrazi Ramp deploys Emrakul, the Promised End through accelerants like Utopia Sprawl, Talisman of Impulse, and Sowing Mycospawn, with Kozilek's Command and World Breaker providing interaction — Emrakul's cast trigger giving them your turn is the primary threat you must counter. Hard countering Emrakul is your most important line; Counterspell, Force of Negation, and Mystical Dispute (if they have any blue interaction) are all capable of doing so, and Consign to Memory handles their artifact accelerants and Ugin's Labyrinth. Orim's Chant on their big mana turn when they're about to ramp into Emrakul or cast Kozilek's Command buys critical extra turns. Teferi, Time Raveler's bounce effect can return Emrakul to hand after it resolves if you somehow can't counter it, resetting the situation at the cost of giving it back. Creature removal is nearly useless here since their threats are enormous Eldrazi and enchantment-based ramp rather than small creatures, so trim sweepers entirely in favor of your counter suite.