Upon gathering a certain number of keys, the keys would resonate and emit guidance, but even Yi Zuo was unclear about the specific number required. He suggested to Yang Yu that every time a key was collected, all the keys should be casually placed together once.
It seems that a certain number of keys must be collected and brought together to unlock a hidden task.
After all, these were keys left by a hero, so the reward for the hidden task should be substantial.
As for how many were needed, there was no rush; it could be done slowly, especially since he was so weak that he wasn't always able to clear the hero's underground maze.
After asking some important questions, Yang Yu also inquired about some trivial details.
Yang Yu had also learned quite a bit about the past Demon Kings.
Since it couldn't be confirmed whether the previous Demon King was thoroughly dealt with or sealed, it was good to be prepared with extra information.
