Transfer essence, also known as essence transfer or transfer life, was a radical dark side Force power used to transfer a person's consciousness into another body, or in some cases an inanimate object. Ancient Sith Lords and other powerful darksiders used this technique to cheat death again and again, haunting their tombs and possessing those who stumbled across their sarcophagi in order to continue their reign of terror. In more recent eras, masters of this dark side art had used advanced cloning technology to assure their immortality.