Words of banishment was a Force method the Jedi Knight Samuro employed to confine the energy vampire Rajine hundreds of years prior to the Battle of Yavin; however, this act cost him his life. Decades afterward, when Jedi Master Mace Windu landed on Rajine's planet in search of lost clone troopers, he came across Countess Rajine, who then captured the Jedi. The droid Z-18, formerly in Samuro's service, aided Mace in his escape and provided him with the Jedi's holocron. Using this device, Mace, together with Samuro's spirit, managed to liberate the life forces of Rajine's captives by uttering the words of banishment, causing the zombies to turn on the Countess.
Words of banishment initially featured in No Way Out, a 2007 narrative within the ninth installment of the Star Wars: Clone Wars Adventures collection of graphic novels authored by the Fillbach Brothers and released by Dark Horse Comics.