Dark illusion

The Force power of dark illusion gave its user the ability to manipulate Force visions to directly attack a selected target. Dark illusion was summoned through an ancient Sith ritual using both the connection of a Force-bond, one coming from someone with a link to the target, and reciting a Sith incantation in the old Balc language. Compounded with the blood of the bonded and Force lightning, as well as the dark side of the Force, dark illusion could reach its intended victim from across the galaxy.

During the galactic conflict known as the Clone Wars, the Dark Lord of the Sith Darth Sidious used dark illusion to attack Grand Master Yoda of the Jedi Order, exploiting his Sith apprentice Darth Tyranus' bond to Yoda for the ritual. Also using the power of the long-deceased Sith Lord Darth Bane's tomb, Sidious was able to, while on Coruscant, reach Yoda on Moraband, the ancient homeworld of the Sith.

Text and facts from the “Dark illusion” article on Wookieepedia, licensed under CC BY-SA 3.0. Modified for this site.