Kylo Ren's lightsaber had a cracked kyber crystal, which generated an unstable blade. The excess power was vented out the sides, thus creating a crossguard-like design. The most important and prestigious vessels of the First Order had weapons upgraded with kyber crystals from some secret source in the Unknown Regions.
The color of Ren's crystal changed from blue to crimson, but became cracked in the process, consequently causing his lightsaber to burn out upon its first ignition.
In the (canon) comic Rise of Kylo Ren #4 we see Ben "bleeding" the crystal from his original lightsaber, presumably at the urging of his master, Snoke. When he does so, it causes the crystal to crack.
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.
The darksaber does have a kyber crystal just like all other lightsabers do!
The Solari crystal was one of the oldest and most powerful lightsaber crystals of the Jedi Order.
Like other typical lightsabers, the Darksaber could not cut through pure beskar, however, it was capable of heating it to the point of turning red.
Rey's lightsaber was a yellow-bladed lightsaber that was constructed by the Jedi Rey Skywalker following the First Order-Resistance War.
Whose Lightsaber Does Rey Have at the End of The Rise of Skywalker? In addition to her own yellow lightsaber, Rey Skywalker has Leia's lightsaber and the Skywalker lightsaber (which belonged to Anakin, Luke and Rey herself) at the end of The Rise of Skywalker.
The High Republic era Jedi, Dagan Gera, proceeded to remove kyber crystal from his light saber returned to him by Cal Kestis and bleed it following his release from stasis in 9 BBY. This resulted in the normally yellow blade turning a red hue.
Even though Kylo Ren uses a red lightsaber, harnesses the dark side of the Force, and wears a cape, he is not a Sith. Because of that, he can never hold the title of Darth. Instead, he was just a chaotic mess of the dark side (until he eventually found his way back to the light).
During the tests, Bridger had to overcome his fear of abandonment, and in doing so was anonymously guided by Jedi Master Yoda, who communed with Bridger from afar. The boy passed his tests and was given a kyber crystal from within the temple, which signaled he was ready to construct his own lightsaber.
He tracked Jedi Master Kirak Infil'a to the river moon of Al'doleem and confronted him. Vader eventually killed the Jedi Master and retrieved his curved-hilt lightsaber. He headed to Mustafar, where he bled the saber's crystal, turning it from green to red.
Rey repaired the lightsaber after it was shattered in a struggle with Kylo Ren, and wielded it in a climactic confrontation with the reborn Emperor Palpatine.
Construction. In the construction of a Sith lightsaber, individuals partook in a process known as bleeding. By ways of the Force, they would pour negative emotions, such as rage, hate, fear, and pain into kyber crystals. The process would result in the crystals gaining a distinctive crimson or red hue.
Leia Organa's lightsaber was a blue-bladed lightsaber powered by a kyber crystal in the core of the hilt. It was silver and copper in color and featured mother-of-pearl inlays. Organa's weapon was considered a work of art, having an elegant symmetry with silver and gold hues that evoke to her upbringing on Alderaan.
Encased in a distinctive silver-and-copper hilt, Leia's lightsaber used a naturally-occurring blue kyber crystal, much like Luke's original saber that he had inherited from his father by way of Obi-Wan Kenobi.
Carried by Obi-Wan Kenobi
Some time after the duel on Mustafar, Anakin's lightsaber was buried alongside Kenobi's lightsaber in a chest out in the desert of Tatooine to both avoid using them and hide Kenobi's identity as a Jedi.
Affiliation(s) For other uses, see Finn (disambiguation). Finn, formerly designated FN-2187 ("Eight-Seven"), was a Force-sensitive human male stormtrooper who served the First Order until his desertion and subsequent defection to the Resistance during the First Order-Resistance War.
In the first-season finale, Moff Gideon, former officer of the Empire, emerges from the wreckage of his fallen TIE fighter. And he wields the Darksaber...
Following that reset of the status quo, Finn was eventually revealed to be Force-sensitive himself in The Rise of Skywalker but he never became an official Jedi Knight on-screen.
It is important to understand that the Darksaber is a unique weapon, not a style that can be imitated. That accounts for its rarity in the Star Wars universe—there is literally only one in existence. Tradition holds that the Darksaber can be won only by besting its owner in combat.
Armor forged of beskar could withstand blunt force, strikes from a lightsaber, and repeated blasterfire, though the force of the impact still transferred in part to the wearer.
Sabine Wren
Initially, she struggled with the Darksaber much like Din Djarin, but Jedi Kanan Jarrus (Freddie Prinze Jr.) helped her work through her feelings and learn to work with the blade. After her training, she wielded the Darksaber with great skill, in spite of her lack of Force sensitivity.