Consign to Memory counters colorless spells outright, such as Sowing Mycospawn and Ulamog, the Ceaseless Hunger — a huge blowout if we catch them off Malevolent Rumble setups — and its replicate mode covers multiple colorless spells in one turn. Harbinger of the Seas turns Eldrazi Temple, Ugin's Labyrinth, Cavern of Souls, and Boseiju, Who Endures into Islands, disrupting the colorless mana this deck needs even though it runs plenty of Forest. Stubborn Denial is unreliable since we're rarely ahead on board with a 4-power creature while racing their ramp, and Street Wraith's swampwalk is irrelevant against their Forest-heavy manabase. Keep Thoughtseize to strip Fight Rigging and their eldrazi payoffs before they resolve, and Fatal Push to answer early creatures.