Who is Merlin and what contribution has he made to England?

Merlin is a close friend of the legendary King Arthur of England. Legend has it that Merlin led King Arthur to the sword in the stone and ruled England. Merlin appeared in King Arthur and The Legend of Avalon, but it is not clear whether King Arthur and Merlin are real people. (See below for details)

As for Merlin, the character Merti, who appeared in The History of Britain, which was written in the early 9th century, is said to be the prototype of Merlin. Martti served in the Welsh court. After his master, Prince Dandoru, died in battle, he was vulnerable, lived in seclusion in the forest and lived like a beast. He also has the ability to predict.

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.

It is said that Merlin is the son of a nun named Carmelius and an elf. When he was a child, he told King Arthur's grandfather, King Voldiglon, that the construction of the Welsh mountain city could not be carried out because there was a fire dragon underground. He predicted that if he passed the throne to Prince Wu Seer, he could repel the Saxon attack and rebuild the country. He predicted that Arthur would give birth to Uther Pendragon. After Uther Pendragon's death, he became Arthur's most trusted adviser, predicted Arthur and used magic to help him. Merlin likes to live deep in the forest with wild animals. He often becomes an animal, talks to them and looks at the stars to predict the future.

Some people say that Merlin is still alive. He lives in a transparent city on an island invisible to human beings. Imprisoned by a beautiful witch named Vivian in a cage made of air in the forest, she did everything Vivian asked.