This is a sigh of the magical world, which is equivalent to what we usually say "My God" or "My God". Because Merlin is a great magician, almost all wizards are based on him: an old man with a tall hat and a white beard.

In Harry Potter, a wizard card attached to the chocolate frog is him, which appears as a necessary prop in the game of the same name in Harry Potter. There is also the "Merlin Medal" in the novel.

Albus dumbledore, the headmaster of Hogwarts School of Witchcraft and Wizardry, won the first class medal. Professor Snape is a second-class medal, and Professor Gidro Lockhart is a third-class medal. There are often "merlin's beard!" "Merlin's fattest underwear!" And other sentences are equivalent to what we call "God".

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Character background—

As for Merlin, Meltti, the character in The History of England, which was written in the early 9th century, is the prototype of Merlin. The wizard on the chocolate frog. "merlin's beard" and "what in merlin's name!" Is widely used in the wizarding world. A statement like this expresses an exclamation.

Merlin is a close friend of King Arthur, the eternal king in Celtic legend. Legend has it that Merlin led King Arthur to point and unify England. Merlin has appeared in many TV series such as King Arthur and The Legend of Merlin, but it is not known whether King Arthur and Merlin are real people. According to the welcome letter from Portmore Slytherin College, Merlin is studying at Hogwarts, and the college is Slytherin.