Alternative Card(s) in Control Slaver Build

[Garth One Eye]

I've been reading the tourney reports and the primer for the Control Slaver build, and it looks like a blast to play.  

I'm almost done with getting all of the cards for it, but wouldn't you know it, I can't locate any Fire/Ice!?  

Are Shrapnel Blasts (1R- Instant -"As an additional cost to play Shrapnel Blast, sacrifice an artifact. Shrapnel Blast deals 5 damage to target creature or player") a feasible alternative until I can find some Fire/Ice?

Also, I've been subbing in Cities of Brass and Gemstone Mines in for the Volcanic Islands, and would appreciate any budget alternatives (other than getting Volcanic Islands)...  Thanks!  

[FORCE-OF-WILL]

Gemstone mines REALLY arent what u want to play, they run out too quickly to be consistant...are you already running 4x shivan reef?
Seat of the synod?
Great furnace?

I might have a few Fire/ices for you

[mtg_player_2004]

Shivan Reefs.

Fire / Ice is ment to kill two creatures at once, so no shrapnel blast won't work.  It's a cheap card though and should be easy to find, if you can't find it substitute in creature kill instead.