Malachor, Site of the Scourge
Over a century ago, Darth Vader had faced off against his former padawan on Malachor, an event that had been recorded in the archives on Mustafar, in Vader's own fortress. That recording, along with a great deal more, had been lost to the Sith for decades, till the Sith Master Veles had reclaimed Mustafar and brought it back under the control of the Sith. Stationed on Mustafar with little in the way of responsibilities, Jasnah had spent a great deal of time in the archives, and during one of her late night visits had stumbled upon a recording of Vader's visit to Malachor, which also happened to contain hints to its location.
It hadn't taken her long to follow the trail to the planet itself, though it had taken a great deal of time to get the help she needed to explore the planet, and discover the secrets it held. She knew her limits, had no issues with admitting that she was not strong enough to face a world that had challenged the likes of Vader, Maul, and even Palpatine. So she had been biding her time, till she finally found someone willing to accompany her on this little adventure.
Having landed on the planet's barren surface, she could feel the Dark Side all around her, in the dust that rose with each step, in the very air they were breathing, and pulsing strongly from somewhere deep below them. Rumors said the temple was somewhere underground, all they had to do was find a way to get there. Stopping before a petrified body, fascinated by the horrified expression frozen on its face, she looked back to give the Sith Master who accompanied her a glance.
"So much power," she whispered as she observed the sea of petrified bodies all around them, taking in the inevitability of it all, "lost forever."