Wild Pair would turn every creature in your hand into a tutor.
Patron of the Orochi is also a very good card for such a deck, as a possible alt general.

You might also try Door of Destinies and for another buffer Adaptive Automaton

Steely Resolve is great protection for tribal

All of those suggestions seem good. I'll look into getting them.

Any suggestions on what isn't the best in the deck?

I don't think that Reliquary Tower is necessary. You may also want to look into Snake Basket .

Reliquary Tower is based off my playgroup. There are alot of helpful cards like Otherworld Atlas , Howling Mine , and the like. Not to mention the card draw off of Seshiro

true

And Ohran Viper instead of Krosan Constrictor ? It is a good snake!

Yeah. It is very sweet. I'm going to be sure to look for alot of the cards mentioned here. The current list is just the stuff I had on hand.

Is Parallel Lives really helping you that much? I mean I'm not really seeing that much token gen to warrant the use of it. Also you don't have one of the best snakes out there, Lotus Cobra ! Also what do you think about Glass Asp as an addition? Nafs Asp is a lower CC of Glass Asp , both look like a lot of fun though.

maybe an Endless Swarm

Firerunner, I agree on the Parallel Lives and that will probably be my next cut. Glass Asp seems interesting by probably not enough of a priority for me to search one out as it's a little low impact.

Eroqnroll, I'm not a fan of epic spells in decks that don't have the tools to make them good. Endless Swarm fits the theme very well, but I don't think I'll be adding it.

Cut a Khalni Heart Expedition , Parallel Lives , Garruk's Packleader , and Brawn for Wild Pair , Patron of the Orochi , Ohran Viper and Snake Pit

I like the choices... Very good deck

+1 Badger badger badger badger badger badger badger MUSHROOM MUSHROOM

i know no blue...but Winged Coatl Mystic Snake and Patagia Viper ...possibility of finding a simic commander....maybe Door of Destinies ... +1 anyways

Caged Sun + Gauntlet of Power = wut

Remember that Chameleon Colossus is a Snake, because he is everything.

Lotus Cobra is a Snake too. So are the new Nemesis of Mortals and Nessian Asp , but the latter is bad. Riptide Replicator will make one big, angry Snake.

Added:

Wild Pair
Skyship Weatherlight
Harmonize
Garruk, Caller of Beasts
Mire Boa
Nemesis of Mortals

Lots of good suggestions here, yeah. Maybe consider Steely Resolve in case removal is ever a pain.

Great tribal deck, how about Door of Destinies

Nessian Asp and Nemesis of Mortals are a couple of new fatty snakes that might be fun in here.

Snake Basket is always a funny card, and it would be a usable fit for your theme.

trousseau11: Nemesis of Mortals is already in the deck.

LeIceTea: I'm on the lookout for a Snake Basket

Update: +1 Lurking Predators , -1 Awakening Zone

Update: -1 Forest , -1 Harmonize , -1 Rogue's Passage

+1 Lotus Cobra , +1 Cavern of Souls , +1 Nykthos, Shrine to Nyx