Four Keys, Four Mechanisms

In his previous life, Happy did not have much contact with All-powerful Medicinal Stone, which was why he did not know that he had such extraordinary skills with mechanisms aside from his hate for evil and otherworldly thieving skills.

Even though All-powerful Medicinal Stone had received no prior information about the place, he had actually noticed that there were braziers on the twelve stone pillars with dragon carvings that had slightly weaker flames. Once he activated the first hidden mechanism, he then used another method to notice that there was an even greater trap hidden behind the four Dharma images. 

Happy said nothing, but when he noticed the serious and somber gaze All-powerful Medicinal Stone cast at him, he smiled happily. "Is there any way for you to be sure what sort of mechanisms they are?"