Chen Long's Eye of the Purgatory, the protagonist of the novel The Tactics of Looking Down on the Body of the Nine Planets, is that Chen Long produced a demon in the process of growing up. He suppressed his negative emotions and generated energy for the eye of purgatory. The battle of extinction was born by merging with the thirteen celestial bodies all day long. It can be said that the eye of purgatory is one of the abilities of the nine planets.
In The Eight-body Tactics of Nine Planets, the protagonist Chen Long's eight-body tactic of nine planets has become a descendant of nine planets, and the descendants of nine planets have two special functions, one of which is the eye of purgatory.