How to get to The Plane of Health
The Plane of Health is the entry zone for The Broken Mirror expansion and you can not port here from the Guild Hall. In order to reach The Plane of Health you'll first want to travel over to The Plane of Tranquility, which is just off of Plane of Knowledge.
In the southwestern portion of Plane of Tranquility, near the Plane of Nightmare zone you will find the a large white crystal (pictured below). Click on this crystal to gain access to The Plane of Health. That's all there is to it!