This deck is from Blizzard’s Off-Meta Spotlight #8, here’s what they had to say about it:
Kingsbane Rogue – 58.8% winrate/51 games
Kingsbane helped Rogues carve up the meta during Kobolds and Catacombs, but the Legendary Weapon hasn’t had the same level of impact since entering The Witchwood. This Kingsbane Rogue deck looks to get that edge back. Utilizing the arsenal of removal spells at its disposal, the deck focuses on managing the board until Valeera the Hollow comes into play, when it can truly take control thanks to its access to double the awesome options!