Rat of the Apocalypse

Overview

The Rat of the Apocalypse is a dimensional minion of Master Shiver, who has worked for Mandelbrot. 
 
The Rat of the Apocalypse is nearly invincible. He came to Earth along with Shiver to capture Alec Wagner. The Rat faced off against Alec and revealed that he was not merely a monster, but could think and speak. He was going to eat Alec and excrete him for Mandelbrot’s purposes. 
 
Alec was able to open a dimensional gate and the Rat went through. It is unknown if he returned to his own dimension or is lost in another.