Fraxinos Entity

 was an incorporeal creature which evolved on Fraxinos.

Biology
The Fraxinos Entity was an incorporeal creature, capable of possessing bodies with the help of a psychograft.

History
The Fraxinos Entity possessed the body of Natalie Sharrocks and destroyed a Chelonian breeding planet. It also attenpted to possess the body of Baxter and commit another crime, but was stopped by the Doctor. Once the Pstchograft was made illegal on Fraxinos, the Entity had no way of possessing people.