Well, there were Dracula, Werewolf, Ghosts... too many things the bailey school kids met. And this time, they met a better creature. More like human, the wizards that really looks like Merlin. He had white hair, and he was quite strange.
Well, the students were quite brave, so they tried to find out something about Mr.Merle. And when they found the crystal ball from Mr. Merle's desk, They could find out about the gold fish named Arthur, that Mr.Merle growing. This is really strange, isn't it?
At the end, Mr. Merle finally changed the library into the medival castle, that we can see from the books or the parades. Well, wizard don't need computers, do they?