4 Ancient Den
4 Darksteel Citadel
3 Great Furnace
2 Mirrodin's Core
4 Vault of Whispers
2 Arcbound Crusher
3 Arcbound Slith
3 Arcbound Stinger
4 Arcbound Worker
2 Chromatic Sphere
1 Coat of Arms
3 Disciple of the Vault
4 Frogmite
3 Leaden Myr
4 Myr Enforcer
2 Myr Retriever
1 Ornithopter
2 Pit Trap
1 Prototype Portal
4 Pyrite Spellbomb
1 Unwinding Clock
3 Welding Jar
Sideboard: