Third eye
The eye looking inside the mind, through time and space, to a place hidden from the real eyes. The Third Eye is an extension of a seeker's power. It peers through holes in the ethereal plane to see what the seeker wishes to observe. It is commonly operated through the Dark, however mystics of the Guru and Yogi inclination may observe through another's eyes through the One Whole.
The Third Eye constitutes an integral part in the arsenal of a seeker. A shared endeavor by several seekers offers a synergized and much more powerful ability which could pierce through the veil of time itself. Despite being derided as meaningless "prophesy without words" mostly by experienced seekers from elder cults, the practice is common among many young cults and even physical powers. The allure of future-sight is too powerful to be deterred by the threat of meaningless visions or self fulfilling prophecies.
See also
The organ of the sight cluster under Harnessing. Concealment holds that opening it makes the seeker visible from the other side — and that finding the hidden belongs to this cluster rather than opposite it. A concealed thing cannot be seen, but the act of concealing casts a shadow like anything else, and the third eye is what that shadow is seen with. Counter-concealment is not a separate art; it is this one, aimed at the wrong sort of dark.