Clark was easily holding off the plague rat. It was jumping at him trying to get at his legs since it was still closer to the ground than him. However, Clark had been adapting to the energies within his body even more lately. That was the bonus of being able to have three beasts within his taming space at once. His body was making unparalleled progress compared to others.
The ghostly steps that he had learned and been adapting to based on the movements of his other beasts was the star of the show. Because Clark was moving so much and dodging so well without even using his spear, the plague rat was becoming tired and slow. This was setting it up to be a perfect secondary opponent for Reese.