4 Darksteel Citadel
1 Inventors' Fair
3 Mutavault
4 Urza's Mine
4 Urza's Power Plant
4 Urza's Tower
4 Adaptive Automaton
4 Arcbound Worker
4 Chief of the Foundry
4 Chimeric Mass
4 Hangarback Walker
4 Memnite
4 Metallic Mimic
4 Scour from Existence
4 Spatial Contortion
4 Steel Overseer
Sideboard: