You need to run black and blue for Grimgrin and diregraph caption only run zombies none of those demons and with ravnica out you can actually run some scavenge and beef up your zombies more here is a link to a zombie deck I made awhile ago some of it itsnt standard anymore but when it was it freaking wrecked hope this helps http://www.mtgvault.com/yrocbtf/decks/zombies/
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What do you mean?
you dont need the birds and elves strait up werewolves and wolves work just fine