There's no reason not to put Emrakul in this deck, if you can get him going reliably.

The deck seems like it's going to work around turn 5 or 6, so you'll need answers for the faster combo decks such as Damping Matrix and Torpor Orb .

Ezuri, Renegade Leader with enough mana he becomes another craterhoof and he regenerates other creatures, hes too good not to use.

@lockiew i only have 4 elves in the deck

1 elvish mystic and 1 llanowar elf? umm do 4 elvish mystics and 0 llanowar elves

nevermind

I fully agree about it being underplayed, I have put it in some of my new tappedout decks and have found it extremely useful.