This is actually pretty easy to unlock. Make sure you get Daniel to Rank 5 so you can edit a deck, then add at least 4 creatures that cost 4 or more. (Don't add the card that shuffles/redraws your hand)
When the match starts, keep playing all the cards in your hand OTHER THAN the 4+ cost creatures. Eventually your hand will be nothing but the 4+ creatures, just play them all without playing anything else in between.