Fancy watching the hivemind flail away at a game which requires careful thought to succeed? The Internet has you covered.
In the same vein as Twitch Plays Pokémon, Hearthmind on Twitch is a livestreamed Hearthstone: Heroes of Warcraft session in which chat commands control the action.
So far it's not very good, and has a tendency to end turns indiscriminately. As you'd expect.
Hearthstone is pretty popular on Twitch already. Blizzard has said it's keen on bringing a proper spectator mode to the free-to-play card battler, which may reduce its popularity on the service.
Not that Twitch will notice; it's the top streaming site in the world.