The Colorless matchup is a race to establish a board before they lock the game with Trinisphere, Karn, the Great Creator, or The One Ring; prioritize landing Kappa Cannoneer and Pinnacle Emissary through Ancient Tomb as fast as possible. Harbinger of the Seas is the premier sideboard card here, turning every Ancient Tomb, Urza's Workshop, and Tron piece into an Island and completely stranding them on mana. Disruptor Flute handles Karn's -2 tutor activation and The One Ring's card draw ability, preventing both the Mycosynth Lattice lock and their resource advantage engine. Consign to Memory and Force of Negation serve as free interaction for Emrakul and Ugin, Eye of the Storms once we have artifacts on board, which this deck accomplishes in the first two turns. Chalice of the Void comes out because it is difficult to set at a useful number—zero cripples our own mana rocks and higher values offer only marginal disruption against their top-heavy curve.