Battle of wits
This was obviously a very gruesome process for Agent 'X'.
However, throughout the kidney-eating process, Lenny did not remove eye contact from him. In fact, Lenny even had a smile at the side of his lips.
After it was done, Agent 'X' was left alone and he fell to the ground.
Lenny had to admit that this was the most seamless operation that he had ever seen in his life. The nether beast that had appeared had not taken anything else aside from the Kidneys, and the healing process had also been fast and swift.
After Agent 'X' was let go, he coughed up blood a couple of time. his face was pale and he could not stop sweating.
Agent 'X' knew as much as Lenny did that things were about to get really bad for him; after all, the kidney had a lot of functions that the human body could not do without, of which included the removal of waste from the body and homeostasis.