Hearthpwn

This is a  deck i used to win Omokk, i defeated him with my first try using this deck after i kept losing while i was using other decks. The trick was to summon Molten Giant  while having duplicate on board while i was stalling the game to get what i needed. I was lucky to get 2 duplicates early on so i actually got 4 Molten Giants. I didnt care about his hero power once the game was on the later stages because he couldnt deal with all the Giants. Healbot and ice block were there in case something went wrong, i used frostbolts, fireballs and flamestrike to deal with any threats and Antonidas finished the game. Im not sure if it will work for any of you but since it worked really well for me i thought i should share it.

PS: Im not sure about doomsayer but he worked for me when i used frost nova and summoned him along with a giant(he had 0 mana cost, i was on 9 life) while i had duplicate and his hero power killed the giant.

Below is my second try, after i already defeated him once. Molten Giant dies, i get 2 extra from duplicate, i summon them and then echo of medivh followed by alexstransza on the same turn. The secret is ice block.