4 Karn, Scion of Urza 1 Cast Out 4 Scrap Trawler 4 Heart of Kiran 4 Metallic Mimic 3 Spire of Industry 4 Walking Ballista 1 Thopter Arrest 1 Inventors' Fair 4 Aether Hub 4 Concealed Courtyard 4 Inspiring Vantage 4 Bomat Courier 4 Scrapheap Scrounger 4 Toolcraft Exemplar 4 Chief of the Foundry 6 Plains