This strategy cares nothing of quantity, only quality
Heres the list so far: Major gains (30% or more): Minor gains (10-30%): Chalice of the Void, Noble Hierarch, Through the Breach, Doubling Season, Horizon Canopy, Engineered Explosives, Ancestral Vision, Mox Opal, Crucible of Worlds, Dark Confidant, Scapeshift, Brushland, Fulminator Mage, Ancient Stirrings, Lotus Bloom
Given that Cogsworth Grandfather Clock also has Ward, which prevents it from being targeted, its possible to get Cogsworth Grandfather Clock out early and keep him play for a while to give your other cards a powerful buff
Avacyn's Judgment
Its the biggest thing on the table every time it comes down, effectively halting the opponents attacks