Using her Mask of Power, Helryx could read the past of an object simply by touching it. When using the mask, Helryx saw a vision. By concentrating hard, she could determine where it took place.
The name of this mask was the Mask of Psychometry.
The Mask of Psychometry worked on only one object at a time. With it, Helryx saw something of the object's past, but she had no control over how much information she actually got.