The feature, which encourages players to combine their powers to take down massive bosses over a set period of time - gaining plenty of loot in the process - appears to be working well too.
All together now
In the latest update to the game - labelled Vault of Tears - Chair has expanded the mode.
Players can now earn extra turns and invite people who aren't even playing the game to do in-game damage by re-tweeting and liking on Facebook.
You can get an idea how this will work in the following screenshot.
The Vault of Tears update is due to go live on Thursday 24 May.
