4 Urza, Lord High Artificer 4 Goblin Engineer 4 Arcum's Astrolabe 1 Sai, Master Thopterist 1 Damping Sphere 4 Whir of Invention 2 Spirebluff Canal 1 Ghirapur Aether Grid 1 Grafdigger's Cage 1 Nihil Spellbomb 4 Mox Opal 2 Darkslick Shores 2 Misty Rainforest 4 Thopter Foundry 2 Sword of the Meek 4 Mishra's Bauble 1 Steam Vents 1 Watery Grave 3 Pithing Needle 4 Polluted Delta 2 Flooded Strand 2 Ensnaring Bridge 5 Snow-Covered Island 1 Snow-Covered Swamp Sideboard 3 Dead of Winter 3 Unmoored Ego 1 Sai, Master Thopterist 3 Battle at the Bridge 1 Ghirapur Aether Grid 1 Torpor Orb 1 Spine of Ish Sah 2 Echoing Truth