If you really like to take cards from your opponent another card to consider would be
it that betrays. Also you might consider either
from beyond or
awakening zone since they produce eldrazi tokens. There is another card, I think it is called
eldrazi mimic or something like that which might work with the big creatures. I would suggest adding few more eldrazi temples or some cards that bring out cards automatically from the deck like
aetherworks marvel. I use it in a token sacrifice deck that does run a copy of
it that betrays which I think will be fun. If you do decide to add either
from beyond or
awakening zone, you might also consider cards like
grave pact.