It was previously revealed why Sith lightsabers are red. It’s because theKyber crystalsinside of them are alive and they bleed. But how does a Sith go about constructing their lightsaber? That is a myth that is finally revealed and made part of the official Star Wars canon in a newStar Warscomic book. And it’s just as ominous and evil as any fan can imagine. Basically, the Sith torture the living crystal, filling them with immense pain.
As anyStar Warsfan worth their weight in action figures can attest, a Sith’s lightsaber is always red. And that color comes from the Kyber crystal inside. WhileGeorge Lucas didn’t have any substantial backstoryfor this when he madeA New Hopeback in 1977, Disney is fully fleshing out this universe, and giving every minuscule thing a reason for existing. Where Lucas just thought it was cool for bad guys to have red lightsabers and good guys to have blue, it turns out there is a more substantial reason than just the aesthetics of visual filmmaking as an art form. And the reason feeds into the story.

Marvel has released a new comic calledDarth Vader#1, which fills in the Sith Lord’s backstory betweenRevenge of the SithandRogue One. Fans finally get to see Anakin’s early days in the Darth Vader suit, and how he struggled with accepting his fate. We also get to see Darth construct his now iconic red lightsaber with a little help from his mentor Emperor Palpatine.
For the first time we get to see Darth Vader and Palpatine training together. In one very interesting scene, the curious pupil asks his master about the red lightsabers, having lost hisblue lightsaberduring his fight with Obi-Wan Kenobi on his future home of Mustafar. Mostly he wants to know how they get their color.
As explained in a previousStar Warsbook, Palpatine confirmed that the crystals are crying blood. These Kyber crystals used inSith lightsabershave been stolen from the Jedi, and they once were regular Kyber crystals. The crystals live in their own unique way, and they do feel pain. When a Sith takes one of the crystals away from a Jedi, and use the dark side of the force, they pour their rage and anger directly into the crystal, causing it immense pain in the process. Palpatine explains it to Darth like this.
“The crystal from anyJedi’s saberwill do. As you know, the Kyber’s are alive, in their way. Like any living thing, they can fell pain. Through the dark side, you must pour your pain into the crystal. And when, at last, the agony becomes more than it can stand…a beautiful crimson. The color of your rage.”
you may see the page from the comic book which fleshes out this scene in full. The comic book will further show how Darth constructed his lightsaber, which is believed to be the one used all throughout the original trilogy. Some believed that Luke Skywalker is wearing the Kyber crystal once belonging to his father on a necklace in The Last Jedi, but it was later officially confirmed by Lucasfilm that Darth’s old lightsaber was completely destroyed along with the second Death Star inReturn of the Jedi. Check out the comic book page thanks toComicBook.com