How do you get to tercessuinotlim

You frist you get 50x bone dusts. Which you can get from bridge (/join bridge).
Then when you get 50x bone dusts go to citadel. (join citadel)
Then go in the cave. Then go to the middle cave then come back.
Then go to the right cave. (--->)
Then keep going right.
Then you'll see a portal.
Go to it then it will say (Joining Tercessuinotlim.)