Voyage of Power

in is the main Quest and will be started automatically. If they do not start from itself you need to activate it while you travel to the Center Maw in H8.

"Journey across the to get the Power Stones and bring them back to the Center Maw!"

It will show you the Power Stones on the map with little Points and a hover text with the number of the stone. The white Point (Ghost Ship is not the correct location of the Power Stone it only show you a part of the route from the ship)