This is the Rosty Rank 1 Legend Totemic Witchdoctor Shaman Deck he used to reach rank 1 early in the October Season. It’s a smart neck choice right now and the Swamp Ooze tech really helps to swing mirror matches.
It’s unfavored vs most Warrior builds which sucks right now as there are a lot of Warriors. But you can sneak a win with a well-placed Ooze and a little luck. It’s almost impossible to recover from two early Brawls though. So don’t be too hard on yourself if this happens.