Hearthstone's New Heroic Tavern Brawl Mode Is About High Cost, High Rewards
Heroic Brawl will challenge even Hearthstone’s most experienced players as they vie for glory and in-game rewards! Participants will create a Standard deck from their existing card pool and lock it in before their first Heroic Brawl match. No changes can be made to your Heroic Brawl deck once you’ve locked it in, so be sure to do a bit of testing before you finalize your deck.The Heroic Tavern Brawl week will replace the free-to-play Tavern Brawl week. In other words, when the Heroic Tavern Brawl week comes, you can't play the original free Tavern Brawl. That could upset casual players a little bit.
As usual, you can watch your friends playing in Heroic Tavern Brawl through the Spectator Mode, or you can cheer on your favorite streamers as they go for the gold. You can read more details at the official site