Cheevo found in H > Zones > Rift > Stillmoor
Route to the Puzzle
Take the Zarephs Return portal into Stillmoor and head over to the base of the tower at /setwaypoint 1757 2316
You need to climb all the way up to the top, using the various steps and platforms..
At the top of the path you will find yourself inside the tower with a plaque to click. Clicking the plaque will take you to the puzzle area.