Master of the Wild Hunt is a great way to deal with flying and/or creatures that you need gone but they don't attack with. I have a wolf token deck that does alright, but I constantly tweak it. If you want to have a look: http://www.mtgvault.com/ViewDeck.aspx?DeckID=303810
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Perfect! Thanks :D
Cultivate would definitely help you out there- 3 mana to search for up to 2 basic lands, one gets put into play tapped other into your hand. Rampant growth is cheaper, but only searches for one land that goes in tapped. Awakening Zone might work really well for your later game colourless mana. 3 mana enchantment, put a 0/1 token in each upkeep that you can sack for colourless mana. These would also be doubled (or more) so you could look at some late game colourless creatures that produce tokens as well, but also helps out with the flashback cost on Increasing Devotion.
Very nice, but I don't understand why you run Heartless Summoning. You only have one creature, so it's only purpose seems to be so you can play that one. I would not bother with it since it's purpose is so limited. The only other problem you may run into is defending yourself long enough until your curses start showing their full potential (with mana costs mostly in the 5 mana range, you probably can only play 1 a turn), but the lightning and terminates should help a bit. Here is my curse deck that I recently made, although it needs some tinkering. http://www.mtgvault.com/ViewDeck.aspx?DeckID=382027
Thanks for the suggestions :) Snapcaster and Glimpse are a little out of my price range for the moment, but I really like the Noxious Revival - never thought of Phyrexian cards. I'll definitely look into getting some Drowned Catacombs too. Thanks!