Gerenz Nuha.
Annan first heard this name when he had just entered the "Nightmare: Gallery".
At the time, he was in Amos's study and saw some forbidden books.
Among them, in "Believing in these deities is dangerous," Annan saw the name Grianznuha Rinfrost for the first time.
In this book, Gerenz Nuha was touted as an ancient deity of the Third Era. His exact words were "a False God newly emerged in the Third Era"—in fact, if you consider the history of The Country of Giants as a whole, it does indeed start around the Third Era.
However, as an individual, the Wizard only lived for a few hundred years.
This disguise was obviously designed to give the reader a sense of security that "he has lived for so long, other people must have already used this ritual, and if anything wrong were to happen, he would have become an Evil God long ago".
