Ring of Flame

A mysterious ancient book with the word "Fire Ring" written on the cover. Below the flame ring are two concentric rings, one large and one small. After four thousand years, the book of inheritance has become yellowed and old because of the long time. The vicissitudes of the past have been buried in the years. No one remembers this technique anymore. But this skill has not disappeared. They once killed the creator of the flame ring, but now, four thousand years later, the descendants of the creator have once again embarked on the path of cultivating immortals, using their blood and magic to start the inheritance. Mortals have died, but immortals will not. The immortals who took away the future of the mortal world here are still high in the sky. The flame ring is changing, are the immortals changing too? Time is like the tide. It rose in the past and falls now. When the tide recedes, the hidden things will reappear. Where will the future go...