The Forbidden Forms were forms of lightsaber combat used by the Sith during the Sith Wars. According to the testimonies of the Jedi Cervil the Uncanny, lightwhips—a lightsaber variant with a flexible blade—were used to defend against Sith Lords who utilized the forms. In 232 BBY, during the High Republic Era, Jedi Knight Vernestra Rwoh, while stranded on the jungle moon Wevo, brought up Cervil's testimonies about the Forbidden Forms to Padawan Imri Cantaros in response to his concerns about the modifications she had made to her lightsaber to give it a lightwhip mode.
The Forbidden Forms were mentioned in the 2021 junior novel The High Republic: A Test of Courage, written by Justina Ireland as part of the Star Wars: The High Republic multimedia project's Phase I.
The Forbidden Forms were mentioned in the 2021 junior novel The High Republic: A Test of Courage, written by Justina Ireland as part of the Star Wars: The High Republic multimedia project's Phase I.