The Darkshear, also known as the spear of midnight black, was a dark side Force power. It enabled the Force-user to summon energy from the Force, usually solely from the dark side, to forge an imperceivable melee weapon in the form of a spear.
It is possible that Kyle Katarn used this technique to kill Dark Jedi Boc Aseca in their duel in Valley of the Jedi on Ruusan, forging a spear of midnight black and hurling it at a momentarily distracted Boc's chest, much to the delight of the Sith spirits that were trapped in the Valley.
While this technique is not available in the computer game Star Wars: Jedi Knight: Dark Forces II, it is described in the novel Dark Forces: Jedi Knight as the method that Katarn uses to kill Boc. However, in the game, Boc is killed simply by the lightsaber duel.
While this technique is not available in the computer game Star Wars: Jedi Knight: Dark Forces II, it is described in the novel Dark Forces: Jedi Knight as the method that Katarn uses to kill Boc. However, in the game, Boc is killed simply by the lightsaber duel.