Remnant's Sith Lords

Darth Vader comes to a planet with a shattered moon and finds a boy with a strong connection to the Force that he cannot ignore, he decides to take the boy as his apprentice. Later, both Master and Apprentice uncover a war that spans the whole of Remnant and find out that some of the world's fairy tales hold some truth in them. Cross-posted on Wattpad and AO3. Rating may change.