Hearthstone Community Event Spreads Viral Card Back

Blizzard is kicking off a new Hearthstone community event today that will spread a nifty reward around like a virus. The "Curse of Hakkar" event features a new exclusive card back that has been distributed to a small group of players, but will infect everyone who comes in contact with it.Playing against a player with the new "Mark of Hakkar" card back will reward you with it. Then you can equip it and begin spreading it to others. You'll need to play a full match to spread the item, so conceding