Griffixis

A beast from outer space! The Griffixis pathogen originally lands on a planet infecting two members of the native population turning them back into children. After this the monster begins to take on traits of all the animals on the planet until it becomes the alpha predator on the planet and is unstoppable. The first known planet to encounter the beast was the home of the monster Nosferadon. That planet fell in short order after the monster arrived. Where the pathogen was created is still unknown and at this time there is no known way to slow or stop its rapid evolution.