RWBY: The Rise of the Siths (RWBY X Star Wars)

This is not canon but a evil version which Y/n become Sith Emperor God. This would take place in the High Republic Era to the Clone Wars. Y/n with his apprentice wanted to end the Jedi with honor and death.

Darth Y/n a Sith Lord who escape from the Sith Civil War. He wanted enters the planet renmant which he encounters a woman named Salem. Y/n found a way to become immortal and revive the Sith Order. Y/n who later absorbs power of the gods later become immortal and sees the chance to revive the Sith Order. Y/n's plan to take revenge on the Republic and the Jedi. The time of the Sith will rise.