So far it is unknown why the blinker stone "behaves" in the way it does, a property inherent to the etheric sciences. Reynardine comments that the stone reacts to the will of the user. Later, that the stone acts as a lens for focusing thought, and that a skilled user can learn to work without the stone, although some people cannot use the stone at all.
Recently Annie has demonstrated a greater ability to use the stone, presumably due tofrom Anja. While on her recent camping trip, she was able to create the illusion of a , and she can now produce both and with light.
However, when Annie experienced serious distress that began once her estranged father, Anthony Carver, reentered her life, her anger was so great that her fire manipulation abilities threatened to go out of control, and she used her blinker stone to contain her powers. Once Annie went to go see Ysengrin in the hope he would comfort her, Ysengrin saw fit to ask Annie for her blinker stone. Noticing Annie was using the stone to suppress herself, he crushed it in his fingertips as means of making her confront her anger head-on.