Oops, I became the witch's substitute

Filin's life was not very good after traveling through time, but fortunately he had magic that was good at deceiving people.
In order to avoid being bullied, Feilin decided to find a big witch to support him.
Filin used magic to create a substitute for the great witch.
The good news is that he successfully made the world believe in the existence of the great witch, and his substitute disguise was a great success.
The bad news is that people are beginning to think that "Filin" is the substitute for the Great Witch.