Mono-Green Eldrazi ramps into Emrakul, the Promised End, Ulamog, the Ceaseless Hunger, and Drowner of Truth using Eldrazi Temple and Green Sun's Zenith; Grafdigger's Cage prevents creatures from entering the battlefield from their library via Green Sun's Zenith, providing a solid strategic hedge. Break the Ice targets their colorless-producing lands like Eldrazi Temple, Ugin's Labyrinth, and Cavern of Souls, crippling their mana base and delaying their high-cost threats. Rite of Consumption comes out because racing via face damage is not how we beat a ramp deck — we want to disrupt their mana and answer their threats with efficient removal like Requiting Hex and Force of Despair instead.

Gruul Basking Broodscale Combo relies on Ancient Stirrings, Malevolent Rumble, and Urza's Saga-style value into Emrakul, the Promised End, whose cast cost reduction depends on card types in the graveyard. Break the Ice is excellent here since the opponent relies heavily on lands that produce colorless mana, such as Eldrazi Temple, Ugin's Labyrinth, and Urza's Saga, allowing us to disrupt their mana development and key nonbasic lands. We cut Rite of Consumption since sacrificing our own creatures for damage is not the priority against a combo/ramp deck we want to out-grind or disrupt, and Serum Powder gives way to Break the Ice as land destruction is more impactful than a mulligan tool here.

Izzet Prowess is a fast burn/tempo deck with Monastery Swiftspear, Dragon's Rage Channeler, Lightning Bolt, and Expressive Iteration. Veil of Summer makes our spells uncounterable against their blue counterspells and grants hexproof from blue, while also drawing a card if they've cast a blue spell (like Expressive Iteration or Preordain) this turn. March of Wretched Sorrow comes in as removal that gains life to help us stabilize. Plunge into Darkness is too slow and life-costly against a deck this fast, and Revitalizing Repast doesn't protect us from a deck that kills via direct damage to the face, not combat, so those come out for proactive protection and disruption.