It is disappointing that you were unable to stir the Arbiter, but we must not give up hope.
Your continued presence in the Shadowlands may help our cause. Perhaps your efforts would benefit from creating a tether to the mortal plane.
The map table in this chamber was put in place long ago by the First Ones, the wise architects of all you see.
If you have a memento from your homeworld, place it there. The table's magic can establish a connection.