Here's my hydra deck. What should I add?

[Deathwish]

Black-green-red

Though It's a hydra deck, I really only have 9 hydra
4 protean hydras
4 primordial hydras
1 apocalypse hydra

Other cards include:
4 Scute mob
4 Bloodhall ooze
3 Corpsejack menace
4 Omnath,locus of mana
1 fungal behemoth

4 Bioshifts
2 Chromatic Lanterns
2 Predator's Rapport
1 Dying wish
2 cultivate
3 flings
2 ranger's path

Here are some of my favorite combos.
1.) The deadly trump

Corpsejack menace and one bloodhall ooze
- corpsejack menace is a green and black that doubles the number of counters that would be placed on a creature. Bloodhall ooze gets a +1/+1 every upkeep if you have a green permanent and another +1/+1 if you have a black permanent. Since corpsejack is both, your trump card now gets a +4/+4 every upkeep.

2.) 7 to cast 20/20

apocalypse hydra and corpsejack menace
Apocalypse hydra's mana cost is (red, green, x) and if x is 5 or more, you place double the amount instead. So if you pay 7 to cast apocalypse hydra, it becomes a 10/10 ( since x is 5) and due to the effect of corpsejack, you get a 20/20 hydra.

3.) one hit ko with 9 manat

Do #2 but add a fling

4.) death by a 10/10

Any card that can gain counters ( primordial hydra, fungal behemoth, omnath), dying wish and fling
- when a creature enchanted with dying wish dies, target player loses life equal to It's power. So fling that 10/10 to deal 10 damage and let dying wish do the other 10.

I'll post more soon but for now, what do you think?

[Keyeto]

I'm going to move this to "Other" where posts about deck building are located. If you wish to post the deck, you can do so by using the deck builder, and placing it in the appropriate section.

[Iandtormentor]

Black-green-red

Though It's a hydra deck, I really only have 9 hydra
4 {protean hydras}
4 {primordial hydras}
1 {apocalypse hydra}

Other cards include:
4 {Scute mob}
4 {Bloodhall ooze}
3 {Corpsejack menace}
4 {Omnath,locus of mana}
1 {fungal behemoth}

4 {Bioshifts}
2 {Chromatic Lanterns}
2 {Predator's Rapport}
1 {Dying wish}
2 {cultivate}
3 {flings}
2 {ranger's path}

Here are some of my favorite combos.
1.) The deadly trump

Corpsejack menace and one bloodhall ooze
- corpsejack menace is a green and black that doubles the number of counters that would be placed on a creature. Bloodhall ooze gets a +1/+1 every upkeep if you have a green permanent and another +1/+1 if you have a black permanent. Since corpsejack is both, your trump card now gets a +4/+4 every upkeep.

2.) 7 to cast 20/20

apocalypse hydra and corpsejack menace
Apocalypse hydra's mana cost is (red, green, x) and if x is 5 or more, you place double the amount instead. So if you pay 7 to cast apocalypse hydra, it becomes a 10/10 ( since x is 5) and due to the effect of corpsejack, you get a 20/20 hydra.

3.) one hit ko with 9 manat

Do #2 but add a fling

4.) death by a 10/10

Any card that can gain counters ( primordial hydra, fungal behemoth, omnath), dying wish and fling
- when a creature enchanted with dying wish dies, target player loses life equal to It's power. So fling that 10/10 to deal 10 damage and let dying wish do the other 10.

I'll post more soon but for now, what do you think?

Don't forget to curly bracketify  it...

[Apathy Reactor]

good strategies! like the deck, but don't forget the brackets!

[Mlerner12]

{Savageborn Hydra}

[Wally]

Considering omnath doesn't get counters he feels a little out of place.
I'd suggest replacing him with  {Vigor},  {Predator Ooze} or even {Gyre Sage}.

[MisterJH]

He wants omnathn so he can drop a huge hydra faster. That being said, 3-4 is too many, and 2 is not enough for omnath to be effective. I concur you should drop him for maybe {somberwald sage}

[Weldrodson]

Exava rakdos blood witch gives all ur hydras haste

[EvACiDe]

{Kalonian Hydra}