Mono Green Hydras -- suggestions wanted

Vintage* Casual Mono-Green

ftaang

Creature (25)

• 1x Courser of Kruphix
• 1x Deus of Calamity
• 4x Elvish Mystic
• 1x Genesis Hydra
• 1x Greenwarden of Murasa
• 1x Hydra Broodmaster
• 1x Kalonian Hydra
• 1x Karametra's Acolyte
• 1x Khalni Hydra
• 1x Liege of the Tangle
• 1x Mistcutter Hydra
• 1x Nissa, Vastwood Seer  ^Flip
• 1x Oran-Rief Hydra
• 2x Polukranos, World Eater
• 2x Primordial Hydra
• 1x Scourge of Skola Vale
• 1x Sylvan Caryatid
• 1x Troll Ascetic
• 1x Undergrowth Champion
• 1x Worldspine Wurm

Sorcery (3)

• 1x Miming Slime
• 1x Prey Upon
• 1x Regrowth

Land (25)

• 22x Forest
• 3x Nykthos, Shrine to Nyx

Instant (3)

• 1x Chord of Calling
• 2x Plummet

Planeswalker (2)

• 1x Garruk, Caller of Beasts
• 1x Nissa, Worldwaker

Enchantment (2)

• 1x Doubling Season
• 1x Forced Adaptation

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Maybeboard

Enchantment (1)

• 1x Doubling Season

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I made this about a year ago or more when I was really into Magic. I haven't made many changes since then. My goal with this deck as it is now is to get out the Primordial Hydra Or another big creature which can use Doubling Season to ramp up fast. Looking for cards to swap out if any of these don't work well or something. Any tips on how to play the deck would be swell as well.

Date added	10 years
Last updated	7 years
Legality	This deck is Vintage legal.
Rarity (main - side)	13 - 0 Mythic Rares 14 - 0 Rares 2 - 0 Uncommons 9 - 0 Commons
Cards	60
Avg. CMC	3.57
Tokens	Ashaya, the Awoken World, Emblem Garruk, Caller of Beasts, Hydra X/X G, Ooze X/X G, Wurm 5/5 G w/ Trample