Dial Ring Medal

The carved seal is a ring, and the sundial is a calamity. High-plane creatures want to explore humans, but cannot interfere directly, so they create many "copies" for humans to enter for trials and survival challenges, thus obtaining the "experimental data" "they" want. But they can't choose too many people, they can only choose some people as test subjects, wait for them to complete the trial, and then expand it to the whole world. Therefore, no one knows what the protagonist group has to face and what they are trying to save.