Windu ' s Guile Windu ' s Guile was a rare variant type of Hurrikaine crystal , which was named in honor of Mace Windu , a Jedi Master and member of the Jedi Council during the last years of the Galactic Republic . The crystals were violet in color and could be used in the construction of a lightsaber , the traditional weapon of the Jedi Order , a group of Force - sensitives who served the Republic as peacekeepers . During the Galactic Civil War , which was fought between the Alliance to Restore the Republic and the Galactic Empire , crystals of the Windu ' s Guile variety were used by Force - sensitives fighting for both the Alliance and the Empire . Properties . Windu ' s Guile was a variant type of Hurrikaine crystal , a type of crystal that was given to a young Jedi Padawan named Mace Windu by the natives of the planet Hurikane after Windu healed one of them . The crystals were polyhedral in structure , had facets of differing size and shape , and could be found as large as an individual ' s fist . Windu ' s Guile crystals were violet – colored . The crystals could be used in the construction of a lightsaber — the traditional weapon of the Jedi Order of Force - sensitive peacekeepers — and produced a brilliant violet – colored blade . A Force - sensitive individual could tune the crystal for use in lightsaber construction . The tuning process caused it to become a focusing crystal that could only be effectively used in a lightsaber constructed by the individual who tuned it . History . The rare Hurrikaine crystal variant known as Windu ' s Guile was named to honor Mace Windu , who had gone on to become a Jedi Master and a member of the Jedi Council during the final years of the Galactic Republic . The crystals were found in the galaxy during the Galactic Civil War , which was fought between the Galactic Empire and the Alliance to Restore the Republic . The crystals were used by Force - sensitive individuals fighting for both sides during the war after the Battle of Yavin . Behind the scenes . The Windu ' s Guile Hurrikaine crystal variant first appeared in " Star Wars Galaxies " , a 2003 MMORPG produced by Sony Online Entertaiment , prior to the game ' s closure on December 15 , 2011 . Originally , the crystals were only available to players of the Jedi profession working for Rebellion or Empire who achieved the rank of general . Once a character achieved this rank , they were able to purchase the crystal from a recruiter for their faction for a base price of one million credits , which was modified depending on which faction controlled the planet the purchase was made on . However , in 2011 , the crystal was included as part of the raid system added to the game in Hotfix 21 . 4 , which allowed players greater access to the crystals . In the game , when the crystal was installed in a lightsaber it gave the weapon a cold damage bonus . In 2008 , Windu ' s Guile also received a card in " Champions of the Force " , the first set of cards for the " Star Wars Galaxies Trading Card Game " , a virtual card game released by Sony Online Entertainment to go along with " Star Wars Galaxies " . The card of Windu ' s Guile was illustrated by the artist Kuki Huang .