The Soulgig is a Teraport-based device. Depending on how it's used, it is either a rescue tool without peer, or a horrible weapon that steals its victim's souls. It works by teraporting all the information out of a living being's or AI's brain, usually into a computer-generated virtual world. This safely moves the person's mind (or as safely as the Soulgig's wielder intends, anyway), but causes the body to instantly drop dead for lack of brain function.
Unlike a typical AI, a soulgigged being does not have any problem migrating from one information system to another.