Hearthstone, the massively popular digital card game from Blizzard, is getting a new mode that pits players against each other, one-on-one, in weekly battles with special rules. The mode is called Tavern Brawl and it's due to launch in mid-June. Tavern Brawl allows players to battle strangers or friends, though only for a limited time each week. "One week might feature preset decks, while another week could have you crafting a brand new Tavern Brawl deck following specific guidelines, while others might offer buffs to specific minion types—who knows!" Blizzard writes.