Nice deck, I think I love the theme and style of it more than the actual deck :P Have you considered adding Horned Helm or Alpha Tyrranax?
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The combination of The Swans of Bryn Argoll and Pariah is disgusting. Those two have the potential to wreck a lot of decks alone. I really like this deck. I recommend an Angel of Flight Alabaster (At the beginning of your upkeep, return target Spirit card from your graveyard to your hand).