Fraxinos Entity

The Fraxinos Entity was an incorporeal creature which evolved on Fraxinos. It was capable of possessing bodies with the help of a psychograft. The Fraxinos Entity possessed the body of Natalie Sharrocks and destroyed a Chelonian breeding planet. It also attempted to possess the body of Baxter and commit another crime, but was stopped by the Doctor. Once the psychograft was made illegal on Fraxinos, the Entity had no way of possessing people. (DWS: The Body Bank)