It's from the Dungeon Run video, you could see the two cards in the Mage's decklist.
Grand Archivist was another card in that list, that's been revealed.
So Blizzard never gave you the cards, that's bullshit. Other people have already figured it out.
Nice try ;)
awww way to ruin my fun
But technically :) they did give part of the card
But no serious I just wanted to have fun and jab at how they accidentally leaked a card name and mana cost in the video (hence "Now how about those dungeon runs? I am sure that new video didn't leak anything")