not sure why you have
Plains in here, or something that produces white mana, but a nice well rounded deck i think. I think youd do well to look at
incremental growth if youre looking to put +1+1 counters on things. also a little disappointed to not see
managorger hydra in here. i think hes a staple of any hydra deck. i would replace the
Khalni Hydra with
Managorger hydra, the
Overgrown Battlement would still be super useful for the
Primordial Hydra for its (X), and you could also put in
Protean Hydra as well, I also highly recommend using
Bioshift, pumping hydras is awesome, until they get exiled, destroyed or tapped (happens to me constantly), and
bioshift allows those counters to be used to their full potential.
this is my hydra deck
http://deckstats.net/decks/60620/520640-hydra-1-1-counter/enit is my baby right now lol