During her internal difference of opinion with the sullen side of the Force inStar Wars : The upgrade of Skywalker , Rey catch a vision of herself as a dark side user , arm with a lightsaber with a fascination connexion to Kylo Ren . Kylo Ren ’s lightsaber dazzledStar Warsfans in the first mystifier forStar Wars : The Force Awakens , withthe Knights of Renweapon differentiate itself from more familiar Sith lightsabers by having both a crossguard and an unstable crimson blade . The visualized double - bladed lightsaber of Rey ’s black side doppelganger has a span of unsound red blades , and the origin of Kylo Ren ’s weapon offer a potential account for how such a artillery might live inStar Warscanon .

Kylo Ren is an astoundingly potent dark side exploiter in theStar Warssequel trilogy , though he ’s a Knight of Ren , not a Sith Lord . His lightsaber , as revealed inStar Wars : The Rise of Kylo Ren , is the same weapon system he used as a Jedi , but its Kyber crystal was removed and “ leech ” via dark side - induce agony , turn it red but cracking it in the mental process . The crystal became volatile and severe , requiringKylo Ren to work up crossguards into the lightsaber , venting the spare energy to stabilise the blade while also providing extra offensive and defensive capability .

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Sidious, Tyranus, Maul, and Vader.

The hypothetical non-white side version of Rey habituate a hinged doubled - bladed lightsaber with two fluid red blades , similar to Kylo Ren ’s weapon . The simplest explanation for such a weapon system is that it was simply a vision and the lightsaber ’s precarious blades do n’t need to make sense , but there is a way that the weapon could exist without contradicting the national system of logic of theStar Warscanon timeline . Kylo Ren ’s lightsaber has a single cracked Kyber quartz glass , demand a crossguard to ventilate its energy , while Dark Rey ’s lightsaber could also use a single cracked crystal , with the weapon ’s 2d blade serving the same role as Kylo Ren ’s crossguard .

Kylo Ren is most likely a practician of Form V , thelightsaber manner that his mentor , Luke Skywalker , used as well as that of his idol , Darth Vader . The heavy - handed yet quick combat form is inspired by Kendo , broadsword fighting , and fencing material , prepare the addition of the crossguard helpful for Kylo Ren upon becoming a Knight of Ren . While Rey is only shown using a schematic single - bladed Jedi lightsaber , she ’d used a quarterstaff for self - defense for years , making a doubled - bladed lightsaber a arm she might have more simpleness at mastering while its building would make cunning use of a cracked Kyber crystal .

While vent the excess energy of a cracked Kyber crystal into a 2d blade makes sense within theStar Warscanon universe , it ’s also worth look at that , outside of Force visions , Rey has only ever seenKylo Ren ’s unstable red lightsaber blade . This likely makes it the default image of a dark side artillery in her mind , so when imagining herself as the Sith Empress ( as oppose to a Knight of Ren ) , she ’d see herself using a brace of unstable red blades , even if the weapon does n’t necessarily make sense . Had Rey fallen to the sorry side inStar warfare : The rising of Skywalker , her two-fold - bladed lightsaber could have had unstable reddish blades like Kylo Ren ’s if it used a cracked Kyber crystal whose excess vim was air out through the second sword .

Emperor Palpatine laughing maniacally in Star Wars: Episode III - Revenge of the Sith.

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