There's Something Wrong with My Career as a Sage

Others traveled through time and became brave, but Yun Heng became a "sage"? When I woke up and became a registered sage on the floating island, I was told: Your hero has not yet been generated, and the estimated waiting time is 300 years. Yun Heng:? ? ? Facing the broken star crown, the lost prophecy, the ether flow (similar to magic) all over the world, and a group of Starborn tribesmen calling him "Watcher"... What else can he do? Build the temple, pick up the pieces, and teach the brave - if he can really wait.