Naga Sadow, a Sith Lord who had enslaved and mutated the Massassi using Sith Alchemy. In the comic book series Tales of the Jedi, it is stated that Yavin 4 was where Naga Sadow hid from the Republic in 5,000 BBY and was discovered several hundred years later by the fallen Jedi Freedon Nadd. According to the comic series, the Massassi warriors who built the ruins used by the Rebels were brought to the planet by the Sith Order in its early years. In the 1994 Jedi Academy trilogy of novels, Kevin J. Anderson suggests that Jedi Knight Exar Kun had the temples built. Enveloped in the dark side, Kun elevated himself to the stature of a god. He enslaved the Massassi and forced them to construct an intricate complex of massive temples that were used for arcane Sith ceremonies and rites as focus for the dark side. In the same series, Yavin 4 is the base of Jedi Master Luke Skywalker's Jedi Praxeum, where he personally trains the next generation of Jedi Knights. Once Skywalker has trained enough Jedi, this duty is taken up by the married Jedi Masters, Battlemaster Kam Solusar and his wife Chief Librarian Tionne Solusar, as well as another former apprentice of Skywalker's, Streen. The Praxeum is destroyed by the Yuuzhan Vong during their invasion of the moon in 26 ABY. The Praxeum is eventually relocated to the ancient Jedi homeworld, Ossus. The original Praxeum is the main setting of the Young Jedi Knights series, based on Skywalker's teenage niece and nephew, Jaina and Jacen Solo. In the young reader novel The Lost City of the Jedi (1992), it is discovered, as the title suggests, that the ancient Jedi built a lost city on Yavin 4. In the animated micro-series Star Wars: Clone Wars (2003), Yavin 4 is the site of a duel between Anakin Skywalker and Asajj Ventress, a follower of Count Dooku. Anakin defeats Asajj, sending her falling down a dark abyss. In Star Wars video games, Yavin 4 appears in the downloadable content for the video game Star Wars: Knights of the Old Republic. Yavin 4 has also been added in the latest expansion (December 2014) of the MMORPG Star Wars: The Old Republic. Titled "Shadow of Revan", the expansion establishes a connection with the previous game. The Super Star Destroyer Knight Hammer is destroyed here when it was diverted towards the