Your eyes have been upgraded to it's prototypical form turning into the Divine Eyes of Balor. Because of your eye's divine origin, you could actualize death simply by looking at the target and tracing the lines of death through your eyes. Moreover, these pair of eyes also work on beings not having the concept of death, by impressing the concept of Death upon them, thereby making them mortal. The only limitation of the eyes are how far you can perceive and the range of your vision. The eyes may have further abilities which you may discover through time.