20 Mountain
4 Goblin Guide
4 Grim Lavamancer
4 Hellspark Elemental
4 Lava Spike
4 Lightning Bolt
4 Magma Jet
4 Rift Bolt
4 Searing Blaze
4 Vexing Devil
4 Volcanic Fallout
Sideboard:
2 Pithing Needle
2 Ratchet Bomb
3 Relic of Progenitus
4 Smelt
2 Sudden Shock