Eriaduian Rat
this large, six-legged rodent was native to the planet Eriadu, where it was the favored prey of several larger predators. However, these rodents flourished when the cities of Eriadu were industrialized, and many of its former predators were forced into extinction by the overdevelopment of the planet. Without its natural predators to keep the population in check, Eriaduian rats began to overrun their small dens, and eventually made their way into the sewers of the cities. Over time, these rats adapted to the toxic sewage that was dumped into their homes, becoming vicious and territorial creatures.