Little is known of this artifact save that it is directly related to Dage and his imprisonment within mother nature. The object also seems to be somehow linked with Rictus.
The only other facts gleaned of the ancient item of power came from the cryptic answers given by a magical book in Asdelor.
What is know;
The book refers to the orb as the mortal soul of a hero who once fought directly against Dage during the last Onslaught. The orb has been lost and those who know how to use it have passed. Only The ancient hero can open its power to you. Only trust will inspire such honor.