Campe
In the Creation myth, Campe was a monster whom Cronus set to guard the Hundred-Handed and the Cyclops in Tartarus. In order to free the Hundred-Handed and the Cyclopes, Zeus had to kill Campe.
Apollodorus was the only author who gave a name to Campe. However, he didn't give any description of what this monster looked like.
By Jimmy Joe