From the podcast:
So, this one, is for people who have been with Universal for a long time. There used to be a certain ride called Dueling Dragons. And if you went through Dueling Dragons queue line, it was one of the coolest things ever. So, what we're doing is expanding that story. Dueling Dragons is going to be a haunted house this year at the event. So, if you remember when you walked through you could choose your fate: Fire or Ice. Merlyn has been trapped and turned into the Enchanted Oak. So, now he's away from the castle and his spellbook is left open and ready for anyone to take. So two evil warlocks of fire and ice: Blizzrock and Pyrrock was what the dragons were called. So they're warlocks on their way to the castle to get the spell book and they're battling and we're right in the middle of the battle all the way through the Fairy Forest, all the way to the castle. They've broken into the castle, we get to the spellbook, they're fighting over it, the counter magic hits them and turns them into dragons. They still continue their battles going through, the castle crumbling all around us. We're being sprayed by hate ice and all sorts of fire. Going through until the very end where you get to choose thy fate. There are four different endings to the this haunted house.