18 Mountain
2 Valakut, the Molten Pinnacle
4 Ball Lightning
4 Burst Lightning
3 Double Cleave
3 Fiery Conclusion
2 Fling
4 Hell's Thunder
4 Hellspark Elemental
2 Koth of the Hammer
4 Lightning Bolt
3 Magma Spray
3 Mimic Vat
4 Spark Elemental
Sideboard:
1 Assault Strobe
1 Forked Bolt
1 Magma Spray
1 Sundial of the Infinite