There are three crystals and to get to the third one is to go through dragons maw or the other side door and cross to get to the crystal. It is impossible for one person to activate all three so work with others to get the job done. Cheyenne PixieSinger Grandmaster life
You can do it with two people, it is just a lot easier with three. Place a teleport at one crystal, go to another crystal and light it, port back and light crystal while the second person lights the third.
I’m usually in Wu if you need someone to run with.
The first time I did it the other wizards knew what to do. But when I went in again(stone roses)I got a guy who didn't have text chat so I had to mark the location of a crystal, menu chat my other friend to activate their crystal then run to use the final crystal!