Tulak Hord's ritual

The ritual of Tulak Hord was a potent Force ceremony created by the Dark Lord of the Sith known as Tulak Hord. This rite, a form of Sith magic, empowered the Sith sorcerer who performed it to execute essence transfer—the relocation of their consciousness from their physical form into a different body. Approximately around 3643 BBY, Darth Zash carried out this ritual.