Each of the new fights is meant to introduce a different sort of mechanic, including gaze attacks (which can only be avoided by players looking away from the source) and a plane-shifting mechanic on the final boss. You’ll have to work together with your teammates to overcome the challenges of the caverns, so make sure to go with your more observant friends for your first few runs. And, you know, close your eyes when appropriate.
Neverwinter patch will send players into the depths of the Spellplague Caverns, and you can be sure that the denizens therein will not be amenable to friendly conversation. No, you’re going to have to fight things, and that means new boss encounters and mechanics to deal with. The developers aren’t willing to completely divulge the mechanics of these encounters, but you can at least get an idea of what you’ll be dealing with thanks to the latest preview.
Source: Official Site