This deck is from Blizzard’s Off-Meta Spotlight #5, here’s what they had to say about it:
Kicking off our trio we have a Dragon’s Fury Quest Mage deck by Fingon in the EU region. Fingon found spell-slinging success with this Quest Mage deck, clocking a 67% win rate at the higher end of Legend. If you’re looking to take advantage of Ice Block in Standard before it rotates out to the Hall of Fame, this deck provides you with a great opportunity! Leaving out staple Mage cards like Frost Bolt creates room for Dragon’s Fury to make an appearance, giving the deck an extra board-clearing punch. Meanwhile, Babbling Book fills multiple roles—it offers early turn plays and helps you complete Open the Waygate. After it’s done, you’re free to make some Arcane Giants and crush your opponent!