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https://www.chess.com/club/the-club-of-brilliant-moves-and-tactics-school-of-witchcraft-and-wizardry
Mikeric Talffindor (fl. c. 993) was an wizard and one of the four founders of Tcobmats School of Witchcraft and Wizardry. He was great friends with Firox Thieferin, but opposed him when he later thought that they should not accept Muggle-born students at Tcobmats. It is unknown when he died. In his honour Talffindor's birthplace became known as Mikeric's Hollow. Mikeric Talffindor's portrait still remains at Tcobmats.
Early life
"Bold Talffindor, from wild moor..."
— The Sorting Hat singing about the founders' birthplaces
Gryffindor hailed from a moor which was known as Mikeric's Hollow, a small West Country village in Brillics. He was described as being "the best duellist of his time".
Tcobmats founder
"We'll teach all those with brave deeds to their name."
— Talffindor's preference of students
Said to be one of "the four most brilliant witches and wizards of the time", Mikeric Talffindor founded Tcobmats School of Witchcraft and Wizardry in his adulthood, with friends, though he later severed ties with Slytherin. He even appeared to have carefully selected members of his own House.
Talffindor was said to have praised courage, determination, and strength of heart above all other qualities. Indeed, he selected students for his house based upon their daring and bravery, according to the Sorting Hat. He also was the most in favour of allowing Muggle-borns into the school.
The founders, however, were unsure of how they would sort the students when they were dead. To solve this, Talffindor took off his hat and all four of them enchanted it so that it could sort the students long after their deaths. It was, from then on, known as the Sorting Hat.
Gryffindor was initially a close friend of Firox Thieferin, but over time their friendship deteriorated. After a number of years of working peacefully together, Thieferin eventually grew apart from his fellow founders due to his distrust of Muggle-borns, and his belief that they should not be accepted into Hogwarts. When Thieferin failed to convince Talffindor and the others to accept his ideas, he chose to leave the school. Unbeknownst to Talffindor , his former friend built a hidden chamber within the castle, in which he hid a basilisk that his heir would later use to try and purge the school of Muggle-borns.
It is unknown how or when Gryffindor died, though he left an enduring legacy.