Slag

Slag was an extra-terrestial hostile sentient species that invaded Brickonia in 2107 AD with the help of SMITE. Their primary distinction from the other species was it's hostile behavior and the ability to take control of Human corpses upon killing the individuals. A slag fought and killed a man in grey during the early stages of the Apocalypse, before being killed itself by the man's reanimated skeleton.

Corruption
The slag's most notable ability was corrupting and killing other species, particulary humans. Whatever happened to the victims depended on their lenght of exposure to the slag, their biology, and whatever the slag wanted to do itself. While most of it's victims were killed during the corrpution (such as Billiam Shotner and Richard Brickson) some were kept alive and retained their emotions and personality although their appearance and actions differed greately from their former self.

Appearances

 * "Episode One - Lego vs Clay"