Sith cave

"Deep beneath its surface rests a locus for the Dark side of the Force."

- Darth Sidious, to Darth Vader

A Sith cave was located on the planet Mustafar. In 19 BBY, Darth Vader visited the cave to bleed a kyber crystal.

Appearances

 * Darth Vader: Dark Lord of the Sith 5: The Chosen One, Part V