Special Tavern Brawl Modes
If you're attending a Fireside Gathering event during the pre-launch period, you will have access to 2 special Tavern Brawl Modes to test the new cards in advance. The first Tavern Brawl is called "Saviors of Uldum: No Cards Barred!", you’ll be able to construct decks using the cards that you open during the Pre-Release event. There are no restrictions on class or duplicates, so go crazy! The goal is just to make a deck of 30 cards, you can put anything you want on it.
The second one is "ldumonium", a pre-constructed Brawl that will include new deck recipes from the upcoming set for you to play with. You won’t need to have pre-purchased packs in order to play this Brawl, though you might want to do so to maximize your Pre-release experience!