So I love the idea of having prophet of kruphix on the field and then throwing down big hydra's on the opponents turn as well as your's.
Here is a rough idea of what I was thinking for a deck. feel free to leave comment's.

May be more of a kitchen table type deck but who know's.

http://deckbox.org/sets/561116

Vorel and Biomass Mutation could easily be pulled for Cyclonic Rift and Rapid Hybridization. Remember that you'll need to remove at least some threats on the opponent's side.