Note: All cheats apply to both the exalted and the master level versions (the exception being the queen will not recall the minions in the master version). The battle consists of the 2 bosses Rattlebones and the Fairy Queen.
Okay! So I decided to make a quick guide to the new Rattlebones dungeon cheats. Check this post for other drop locations.
This duel is dropped by Rattlebones in unicorn way.