User blog comment:MarasuneX/Would you like to see another expansion/@comment-24027772-20131012140539

As a free DLC, I think they could convert an arena (an Everfal room, the Rotunda of Dread or somewhere else) to a somehow random challenge area which keep becoming harder and harder each time you clear the previous trial.

There are a lot of monster combination we've never encounter which could potentialy be very challenging / frustrating ; )