Fire-
Astrocomet
Rothus x2
Deadly Fighter Braid x4
Brawler Zyler x3
Magma Gazer x1
Tornado Flame x3
Water-
King Dephcon
Phantom Fish x2
Spiral Gate x3
Agua Hulcus x3
Marine Flower x3
Candy Drop x2
Hunter Fish x2
Nature-
Thorny Mandra
Roaring Great-Horn
Stampeding Longhorn
Poisonous Mushroom x3
Mighty Shouter x3
Coiling Vines x2
Fear Fang x2
Burning Mane x2

I think you should have two different civilizations, and 42 cards in a deck.

Fire- 15
Rothus x4
Deadly Fighter Braid x4
Brawler Zyler x4
Tornado Flame x3

Water- 12
King Dephcon
Spiral Gate x4
Aqua Hulcus x4
Candy Drop x3

Nature-13
Roaring Great-Horn
Bronze-Armed Tibe x4
Poisonous Mushroom x4
Mighty Shouter x4

Just a thought

But dont I need some blockers??

Try to have 14 good blockers.