One of a group of magic combat staffs with special “legacy” powers. This one is wielded by the Monk Kesi, a member of the Voyager group.
Originally, simply a +1 Quarterstaff, Kesi later learned that by tapping the staff on the ground, she could invoke a personal Protection from Chaos spell. Once this spell was activated, a second tap would extend the protection out to 10 feet.
As she became more in tune with the order of the universe, she gradually learned that her staff has vast powers beyond what she was previously aware.
See the following animation for the staff's appearance: Staff of Law