Darksiders could inflict pain and injury upon their foes merely by looking at them, causing victim's body to burn and smoke as they died. The user of Deadly Sight could damage entire groups of foes within their field of vision.
Tiring to sustain, it was inefficient in terms of the strain caused on the user's Force reserves, but was nevertheless effective in the right situation.
It should be noted that Deadly Sight injured everyone that the user looked at, including allies and civilians; it is unknown whether or not it could be refined, especially because of its dark nature.
- The Jedi Path: A Manual for Students of the Force
- Star Wars: The Card Game – Knowledge and Defense (Card: Deadly Sight)