1 Mystic Forge 4 Urza, Lord High Artificer 4 Arcum's Astrolabe 3 Goblin Engineer 2 Spire of Industry 3 Whir of Invention 1 Inventors' Fair 1 Ichor Wellspring 1 Nihil Spellbomb 2 Galvanic Blast 4 Mox Opal 4 Scalding Tarn 4 Thopter Foundry 2 Sword of the Meek 2 Chromatic Star 4 Mishra's Bauble 1 Breeding Pool 1 Steam Vents 1 Watery Grave 2 Pithing Needle 1 Welding Jar 1 Pyrite Spellbomb 4 Polluted Delta 1 Ensnaring Bridge 4 Snow-Covered Island 1 Snow-Covered Mountain 1 Snow-Covered Swamp Sideboard 3 Assassin's Trophy 1 Damping Sphere 2 Fatal Push 3 Ceremonious Rejection 2 Collective Brutality 2 Tezzeret, Agent of Bolas 2 Thoughtseize