This deck has been play tested and is remarkably strong, not to mention a ton of fun to play
Its commander, Teval, the Balanced ScaleTeval, the Balanced Scale, manages to enable a graveyard strategy with a small ramp subtheme to help power out the Dragons that it and every other Tarkir: Dragonstorm precon wanted to include a least a few of
Having removal spells that will answer them is vital to doing anything in multiplayer because you will see them
Prison/stax decks stop your opponent from playing cards and attacking you while gaining incremental advantages over time, be it with lifegain, Treasure tokens, or card draw
But it has affinity for artifacts so he'll be cheaper, and with enough artifacts he should only cost very little (the Command Tax can also be affected by affinity)