I've built a very similar deck that goes for the kill in one hit. I'm using lots of cheap myr creatures (iron myr, silver myr, palladium myr) to generate mana fast, then having 4 fire servant's in the deck. Use fireball and/or red sun zenith as they both do the same thing. I've also got 4 galvanize since the myr creatures allow the metalcraft to boost it with fire servant to a 8 damage 1 drop spell
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