City of Steam has announced that a new patch will be deployed next week that will see significant additions to the game including a higher level cap, improved/expanded quests, and the introduction of the new Channeler class.
In addition, the team has also posted a developer diary to lay out some forthcoming changes to the events system. Speaking about the Arena Survival Event:
The basic premise of the Arena event is wave-based survival. You get a few breaks in between the ever-ramping difficult levels, but nothing stops those enemies from piling onto you. Well, until you reach the boss of course; he will present a whole different type of challenge. There’s currently an arena in the Refuge, Heartland Road and Meluan’s gate, and plenty more to come.
Read more on the City of Steam site.