4 Blinkmoth Nexus
4 Darksteel Citadel
4 Urza's Mine
4 Urza's Power Plant
4 Urza's Tower
4 Arcbound Crusher
4 Arcbound Ravager
4 Arcbound Reclaimer
4 Cranial Plating
4 Darksteel Myr
4 Energy Chamber
4 Ichor Wellspring
4 Lodestone Golem
4 Prototype Portal
4 Steel Overseer
Sideboard:
4 Buried Ruin
1 Hangarback Walker
1 Walking Ballista