What made Yoda's lightsaber unique was its scaled-down size. Aside from that particularity, the weapon had a simple design, consisting of a studded chrome handle with black trim and an emitter shroud. It contained a kyber crystal that put forth a bright green plasma blade.
Like many Jedi did for hundreds of years, Yoda built his lightsaber under the aegis of Professor Huyang, an architect droid who had been with the Jedi Order since its nascent days. As a first step, Yoda acquired a kyber crystal from the icy caverns of Ilum, a mission that proved to be very eventful.
The lightsaber was put to good use on Geonosis, when Yoda was forced to confront his former apprentice Count Dooku while the first battle of the Clone Wars was being fought outside.
In the years of the Clone Wars, the green-bladed saber served its master well on multiple occasions. However, Yoda eventually lost his weapon when he dueled the Dark Lord of the Sith Darth Sidious in the Senate Building. When Sidious unleashed bolts of energy to disarm him, the Jedi Master lost his lightsaber, which fell to the ground below.
With that, Yoda lost the lightsaber he had treasured. After the rise of the new Galactic Empire, Grand Vizier Mas Amedda spoke to a gathering of citizens on Coruscant about the end of the Jedi Order and the freedoms that the Empire would bring to the galaxy without the Jedi. He had a collection of lightsabers from fallen Jedi, including Yoda's lightsaber. These lightsabers were burned as part of the public demonstration, and their kyber crystals caused a large explosion of energy during the gathering.
Subsequently, Yoda didn't want to wield another lightsaber. However, he kept another lightsaber in a box in his hut in 3 ABY. After Yoda's death in 4 ABY, that lightsaber ended up in the possession of Yoda's last Jedi apprentice, Luke Skywalker.
Yoda's lightsaber was originally created for the Star Wars Legends 1999 reference book Star Wars: Episode I The Visual Dictionary. It later made its first canonical appearance in the 2002 film Star Wars: Episode II Attack of the Clones, the second installment of the Star Wars prequel trilogy.
The 2016 reference book Star Wars: Complete Locations depicts the lightsaber as being stored in a box in Yoda's Hut by the time of the events of Star Wars: Episode V The Empire Strikes Back. However, the comic Darth Vader (2017) 1 shows that it was destroyed during a celebration of the Jedi Order's eradication. When asked about this, writer Charles Soule mused that perhaps Yoda built a new one, that he had more than one or that Darth Sidious built a fake to make a point. Lucasfilm Story Group's Matt Martin later stated that they are aware of the discrepancy, but that it wasn't an error as Yoda likely had more than a few lightsabers during his lifetime. The discrepancy was later seemingly solved in the 2022 comic Crimson Reign 3, which stated that one of Yoda's lightsabers was destroyed during the celebration. This implied Yoda's second lightsaber was shown earlier in The Book of Boba Fett episode "Chapter 6: From the Desert Comes a Stranger," where Luke Skywalker offered it to Grogu.
The short story "Masters," however, later established that Sidious wanted to collect Yoda's first lightsaber after his death and store it within the Imperial Palace as a trophy, which would suggest that Sidious did not have it destroyed as depicted in Darth Vader (2017) 1. Whether or a second lightsaber existed in this version of events is uncertain.
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