He headed to Mustafar, where he bled the lightsaber's crystal, turning it from green to red. Vader used Kirak Infil'a's lightsaber in conjunction with his corrupted, red kyber crystal in multiple conflicts, such as when he briefly fought the Grand Inquisitor and Jocasta Nu in the former Jedi Temple.
A dual-phase lightsaber was a lightsaber that contained two or more kyber crystals, allowing its blade length to be extended or shortened in the middle of combat. Darth Vader's lightsaber was an example of one, with the weapon achieving the feature with two kyber crystals.
Why didn't Anakin's lightsaber turn red in Revenge of the Sith?
So, that's the real reason Anakin's saber didn't change color -- because the process of lightsabers changing colors (after bleeding) didn't exist as a concept when Revenge of the Sith came out. At the end of the film, Darth Vader loses his lightsaber during his duel with Obi-Wan.
After destroying the Jedi Temple in 28 ABY, Ren used the dark side of the Force to bleed his lightsaber's kyber crystal, changing the color of its plasma blade from blue to red.
The Darksaber. The only black blade-like Saber ever made, constructed with fine Beskar, by the only Mandalorian to ever become a Jedi in the Order's entire history.
Ghostfire crystals were a type of rare and entirely transparent kyber crystal that grew from rocky foundations and formed precarious and nearly invisible spires of stone. They could be found on a handful of worlds in the Outer Rim Territories and most commonly appeared on mountain peaks.
The crossguard blades allow Ren's saber to operate safely – his weapon is constructed around a dangerously flawed kyber crystal, which would be overloaded if not for the lateral plasma vents that create the quillons.
Intriguing theories have emerged suggesting that Count Dooku, in his quest for power, bled the Kyber crystal of Master Yaddle, a revered Jedi Master, to create his Sith saber.
Like all lightsabers, the Kyber crystal within the Darksaber focuses the weapon's energy on producing its blade. However, the Darksaber's crystal and the gun have unique properties, resulting in their black coloration and distinct blade characteristics.
It's not until he abandons it that his crystal glows in front of him. No, Kyber crystals aren't real. Mainly because they're a made up object made purely for Star Wars lore, but also because the amount of power they contain just isn't possible.
Purple itself is considered the most powerful lightsaber color in the Star Wars galaxy. Very few Jedi have ever wielded a lightsaber of this color. The only two people known to have wielded a purple lightsaber are Mace Windu and Darth Revan in the past.
Despite appearing in Star Wars: Episode III - Revenge of the Sith as a member of the Jedi Council, Coleman Kcaj is one of Star Wars' most obscure Jedi. Very little has been revealed about this Ongree Jedi Master, though he appears as a background Council member in several scenes of The Clone Wars.
However, a groundbreaking study conducted at the University of Leicester's Centre for Interdisciplinary Science challenges these long-held assumptions. The study suggests that, against all expectations, red lightsabers may actually be the weakest of the lot.
Darth Maul's double-bladed lightsaber is the epitome of intimidation and strength. Featuring two crimson blades powered by potent kyber crystals, it's a weapon designed for dominance and crowd control.
Kylo Ren's obsession with Vader is clear, but Star Wars never explained how he acquired the helmet. It is speculated that he may have found it himself on Endor, or it could have been passed down to him by Supreme Leader Snoke.
The fate of Luke Skywalker's old lightsaber appeared to be symbolic of his philosophy; it was shattered in a Force tug-of-war between Rey and Kylo Ren. Even its Kyber Crystal was broken. And yet, in spite of that, Rey succeeded in repairing the lightsaber in Star Wars: The Rise of Skywalker.
