This deck is from Blizzard’s Off-Meta Spotlight #5, here’s what they had to say about it:
Last on our list—but certainly not least—we have Zetalot with a Gilded Dragon Control deck. Zetalot, who’s earned a reputation as a guiding light for Priest players, piloted this deck to an impressive 66% win rate over 123 games. Nearly reaching the pinnacle of the EU ranked ladder, Zetalot’s list initially appears to be an unassuming dragon/control hybrid. However, opponents quickly discovered out that this deck hides a deadly finishing option. Using the Coin from the single Gilded Gargoyle to help set up the finishing combo, this Priest pilot can combine the spell-pumping power of Prophet Velen with the burst of double Mind Blast to deliver 20 damage in a single turn!