This is the Trump Renounce Darkness Warlock w Y’Shaarj he’s been playing on stream this season. (season 31, oct 16).
Renounce Darkness is a fun card and there have been some interesting decks that have used this card. This is actually one of the stronger lists, Y’Shaarj is a fun card also, and played with Barnes there is a good chance you will be able to pull it out early.
This combo of Barnes into Y’Shaarj is one of the strongest combos in the game and has been used in Hunter a lot. After flipping all your Warlock cards and getting some discounted cards there are some crazy things that can happen!