Several Standard Days Later
Vex took the Empress' offer to travel with her. She had never actually been inside a Star Destroyer before, and there was no way in Bogan she was going to give up the opportunity to travel on the Empress' destroyer. She had also never been to Mustafar; but she had heard the tales. Fortress Vader had been a major inspiration for Castle Gaol. Both its exterior appearance and the reputation she intended for it to have some day.
When they arrived on the volcanic world, she peered out the viewport of their ship and gazed down at the obsidian spire spearing out from the molten flats. The power radiating off of it... It wasn't just impressive, it was menacing. Immediately she was chilled to her bones. And this was what it was like with Vader dead. It was hard to imagine this place when he was alive. The terror it must have inspired. It was almost enough to be envied.
"So, that's the legendary Fortress Vader," Vex voiced alloud, not quite sure if the Empress heard her. She spoke up slightly louder the next time. "I must confess, I didn't expect Darth Vader to be the alchemical type." She recalled the Empress saying there would be supplies here that they needed for their experiments. She was curious what those supplied were. "Then again, I don't think anyone knows everything about the man. He was said to be very reclusive." @Phoenix