This Faces the Abyss

In this bizarre city, there is a "list" that is never made public. There is also an "artist" who designs a unique death for each person on the list based on the picture. The rich witness spontaneously combusted in front of everyone, but no witness saw the murderer; The stomach of the corrupt expert was stuffed with delicacies, and his death was like a reproduction of a classic painting... Every scene is a challenge to the police. This is not a cat-and-mouse game, but a "teaching" between mentor and student. The question is, when students finally leave school, what attitude will teachers take to welcome this graduation ceremony?