Where is the rat?

"W-What?" The man was a bit intimidated by Hecathe's height that was clearly taller than him but he still pretended to be unfazed. However, one couldn't say that he did a good job at pretending since his fear could be seen in his eyes. 

"I'm the type of man that doesn't easily get fooled," Hecathe spoke up, giving an answer to the man's previous question. 

"So now tell me, which one of you has the ability to change cards," Hecathe didn't even bother giving the man time to say anything as he questioned in all seriousness. 

The man immediately gulped in response as he heard the question and looked to be a bit scared as he shook his head and stuttered out, "W-What are you talking about? What changing c-cards?" 

Hecathe sighed as he looked at the face of the poor liar, "Why are you trying to waste my time? If I ask you a question, you give me an answer, isn't that how it works?" 

Hecathe glared at the man who refused to talk.