This is the Superjj Miracle Rogue w Barnes he was playing on stream
. Early signs are that Barnes is insane in Rogue decks with burst damage and Gadgetzan.
A tip here is not to play Barnes on curve if you have a stronger play. You need to have some spare mana and spells in hand. If Barnes spawns a Malygos or Gadgetzan Auctioneer you want to either start cycling or throwing burn spells around.