Vader's wayfinder

Vader's wayfinder was a Sith wayfinder that led to Exegol. Initially in the possession of the Eye of Webbish Bog on Mustafar, the Eye gave the device to Sith warlord Darth Vader after meeting him. At some point after Vader used the device to learn what his Sith Master, Darth Sidious, was doing on Exegol, he returned to Mustafar and tasked the Eye with protecting the Wayfinder. Decades later, the Alazmec of Winsit guarded it at the ruins of Fortress Vader in Corvax Fen, but Vader's grandson, Supreme Leader Kylo Ren of the First Order, led an assault on the Sith cultists there to obtain the wayfinder. After the Eye gave him the device, he used it to make his way to Exegol, where his grandfather's Master awaited alongside the Sith Eternal cult, preparing for the launch of his fleet. Later it was used by Rey to go to Exegol to stop Sidious for good while providing coordinates to the Resistance.

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