Here is my [Sea Giant] deck:

Earth Shock x 2
Lightning Bolt x 2
Zombie Chow x 2
Flametongue Totem x 2
Haunted Creeper x 2
Feral Spirit x 2
Hex x 2
Lightning Storm x 2
Mana Tide Totem x 1
Unbound Elemental x 1
Defender of Argus x 2
Gnomish Inventor x 1
Violet Teacher x 1
Bloodlust x 1
Azure Drake x 2
Fire Elemental x 2
The Black Knight x 1
Sea Giant x 1
Ragnaros the Firelord x 1

I don't have 2 Sea Giants so I replaced one with Firelord, last season I can get RANK 6 from RANK 20 in 12 hours very easily with this deck (US server) , but now META changed a lot, players all knows how to deal with this deck, this deck was reported as bot in many forums, now it can only stay at RANK 18/19.

Just search Reckful's Sea Giant deck.

http://www.hearthpwn.com...-the-sea-legendary-deck

I wouldn't use it any more though, the meta has changed - even playing it myself I can only get to about rank 7. Just use Deathrattle Shaman instead, it's somewhat better.