Hearthstone players who participate in Fireside Gatherings not only get to play locally against other competitors out there in the real world, they also get to occasionally take part in special Brawls that are not available to play online.
February marks the introduction of a new limited-period Brawl called Tag Team 2 v 2. This event launches with nine pre-made decks (one per hero), and will see you and a friend taking turns to see off another pair of competitors.
Each team plays on a single device, with the first player on each team getting to select their preferred deck from the nine on offer. When a player is defeated, their friend jumps in and will have to select one of the remaining decks using the Discover process. The first team to get three wins takes overall victory.
If you'd like to get a look at the decks, head over to the announcement of the game's official site. You'll also find more information there about either setting up a Fireside Gathering yourself, or tracking down an event that's taking place near you.