Altar of Mortis/Legends

The Altar of Mortis was a structure that was located in a cavern deep underground on the planet Mortis. It safeguarded the Dagger of Mortis, a weapon that was capable of killing such powerful Force-wielders as the Father and his children. It was the Daughter who brought Jedi Master Obi-Wan Kenobi here to find a means of killing the Son.