Seems a little expensive mana-wise, with a lot of Reanimate cards being 4 to 5 mana. Also, I only see Buried Alive (and possibly Last Rites) as the only means of getting creatures into your graveyard. There are also about 12 targets for Reanimation: you can make space by removing about half of them, get some Dark Rituals in there for faster mana also! Animate Dead and Exhume are good: you might also look into Reanimate for a much faster start (one black mana compared to 4 or 5 mana of Beacon of Unrest, Dread Return). Finally Griselbrand is pretty much a must, and Jin-Gitaxias, Core Augur helps get what you need fast while also shutting down your opponent. Pretty solid though, I really like the Living Death idea!
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Check out Collective Unconscious! Six mana doesn't sound too expensive for this deck (or any Elf deck really), and it's a bunch of cards all at once. Fun to play with when a lot of mana is available.