You see a scrying ball.
Location
In the Elvenbane tower (here), and in the tower of the Zao Palace Antechambers (here).
Notes
These orbs can be used to foretell the future and make one extremely powerful in armed conflicts.
Looks the same as a Crystal Ball, a Crystal Ball (Object), and a Mago Mechanic Core.
Destroyed in the To Blind the Enemy Quest and the An Uneasy Alliance Quest.