When Predators come back from hunts they come back different beacause of the experience of his clan brothers dying, so some Predators experiment on themselves to try to make themselves stronger for more hunts. But they become obsessed in making themselves stronger that they physicaly mutate into abominations.
They will be featured in the 2010 film Predators
The BSP has a grey head and reddish-brown body. They also have red and orange eyes