The Force and Vader's coordinates led Null first, to a warehouse in the slum districts of a major Onderron City.
She sensed something there that didn't feel like a person... but more like a wellspring of the force. Like one she had never felt before. She landed the rented speeder about a block from the warehouse to avoid attention, her hood pulled up over her ears. She kept one hand on her vibrosword at all times, the other ready to snap the lightsaber on her belt into her palm and activate it. She walked around the warehouse pensively. The feeling was not that of a jedi... she was almost certain... so... what then?

Seeing a window that was cracked open on the third floor, she focused herself. In one leap she had scaled half the distance between the window and the ground, vaulting off the wall to the one opposite before flipping backwards and grabbing the open pane. Then it was just a matter of pushing off the wall to turn the window in its hinge and slip inside. Easy as mynock pie.

Strangely enough, the warehouse seemed completely empty of any life. Null realized why upon going downstairs and finding half a dozen Onderrans lying dead from blaster wounds. It looked like an ambush, something which unsettled Null greatly. Could this be a trap? her nerves were further rattled by the sound of voices below.
Creeping down the steps to the ground floor, body pressed against the wall, she heard one yell, "Boss! We found them! Not one but two!"

"Bring them here!" a gruffer alien voice shouted back. Null peeked around the corner just as a humanoid ran up with an extremely small package in his hand, maybe the size of a jewelry box. The Trandoshan he handed the box to opened it immediately, licking his unblinking eyeballs to clear the dust from them. "Why are they so dull? I thought these gave lightsabers their color?"

[i]Kyber Crystals![/i]

An architect droid in the group spoke up, "Jedi end up with specific colors for lightsabers when they interact with their force crystal. Imbuing the crystal with themselves gives it its rich color, so that it can be used in lightsabers."

"Are we gonna need a jedi to make these crystals work? I thought there weren't any anymore."

"No," responded the droid. "A little known alternative to directly interacting with the crystal is to take it to a particularly force sensitive planet, where an incubation period would be required. My records show that the best planet for this process would be Tythos."

[i]Tythos again... [/i]

"Well fine then! Whatever we have to do to make ourselves some lightsabers! I'll keep one for myself and we'll sell the other to the highest bidder! This proves to be our most profitable venture yet!" The other humanoids and Trandos cheered and howled in excitement. They didn't notice the slinking form coming upon them until it was too late. The fight lasted seconds. In one efficient twisting swing through their chests Null dispatched one humanoid and two Trandoshans, the Zabrak in the group swung a hefty looking vibroaxe her way but the swing was inexplicably redirected straight into the skull of a trando in the process of raising his blaster. She quickly beheaded the zabrak with her sword and turned to face the Trandoshan boss, who was now alone on the floor. He fell to his knees and laid down the package, curling into a simpering ball. "Please don't kill me! I just wanted to learn to use the force!" Null raised a hand, lifting him into mid air.

"Oh? And how exactly was an illegal lightsaber going to help you accomplish that?"

The lizard made some hissing whimpering noises as he struggled in the air. "You know... the lightsabers give you these powers... I wanted to be able to move [i]shrak[/i] with my mind... predict the future..."

Null rolled her eyes. "Lightsabers don't give you power. They are just a sword."

"What...?" the lizard had just enough time to squeak out before Null crushed his spine.

Null bent down to pick up the two crystals... [i]What a rare find...[/i] picking one up between her thumb and forefinger, she felt a sudden surgance in the force, and the crystal seemed to shed its dull grey-blue coloration like a layer of paint, replacing it with blood-red adegan coloring. The feeling that this crystal was always meant to be hers surged through her mind. She held up her lightsaber, looked at it, then back at the crystal. Then, floating it  a few inches above her hand, she focused on sliding it open. She needed not fully disassemble it, but she removed the crystal housing where a perfectly constructed red synthetic crystal had been housed. Carefully she slotted the new kyber into its housing. Then she closed it up, and brought it back into her hand. She turned on the blade, and marveled at the beautiful deep crimson of her new saber. It was matched in color by Vader's himself...

Shutting it down, she looked to the two crystals in the case. Grabbing the synthetic crystal, she tossed it to the ground, smashing it under the heel of her boot. Then she picked up the second crystal, entertaining ideas in her mind of a double bladed weapon... after all, they were clearly a pair... but no matte rhow much energy she tried to focus through the crystal, its color did not change. After a few attempts, the crystal seemed to pull away from her... not literally, physically... but she felt a tug in the force... would this other crystal lead her to the jedi Vader had sensed? Was it destined for one of them? 

Null wasn't sure, but she trusted the force, and slipped the case into her pocket. It was time to see where this trail led.