This deck looks great, it reminds me of what I played at the pre-release event for the set. Personally I don't like the eldrazi but the
bloodbriar is the crown jewel of the deck. He ties everything in together. If you added the enchantments such as
vessel of nascency it would speed up your graveyard flow, get what you need in your hand faster, and you would be SACRIFICING a permanent. Just some ideas you might enjoy.