The primary idea behind this deck is to kill the opponent using the effects of Boros Reckoner and Spitemare.

Shivan Meteor is beautifully inexpensive, and allows me to cast one of my suicide bombers the following turn if necessary. Earthquake can be absolutely devastating to a filled board. And, if I have two of my suicide bombers in play, Blasphemous Act is instant death to a player that hasn't been using lifegain. Volcano Hellion is a bit more situational, but he can ensure a win as long as I have more life than my opponent.

Pariah and Boros Fury-Shield can be used both defensively and offensively depending on how the field looks at the time.

And finally we come to Vexing Devil and Spark Trooper , who both act as walking burn spells to help whittle the opponent down to a manageable size.

This deck is still in it's early developmental stages, so I'm looking to get any advice that I can to improve it. (Keep in mind that this is not meant to be a deck for tournament play. I understand that this could never hold it's own against the fiercely competitive constructed environment. I made it because it's fun to play with. But that doesn't mean I don't want it to be as good as it can be!)

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Edit

Taking some advice from others, I made a few changes:

I took out Blasphemous act, as it was too expensive at any point that the field wasn't set up perfectly. I replaced it with Dictate of the Twin Gods as it boosts everything else the deck does, as well as comboing well with a number of the spells I'm already running.

I replaced Vexing Devl with Lightning Helix, which can be used both defensively and offensively, as well as heal me a bit to make my Volcano Hellion win more likely.

I replaced Spark Trooper with Pyroclasm as it lowers my mana curve a bit and seems to be a much more well rounded spell in the context of this deck's playstyle.

And finally, I boosted my land ration up to 22 instead of 20.