Welcome to Harry Potter Theory. Today, we'll be discussing some of the best secrets held by founder of Hogwarts School of Witchcraft and Wizardry, Salazar Slytherin.

A pureblood British wizard, Salazar Slytherin is one of the first known individuals to have possessed the ability to speak the language of the snakes, a rare, genetically inherited skill referred to as Parseltongue. He was also said to be skilled at Legilimency, which is a complex form of magical "mind reading". As an incredibly talented and powerful wizard, Salazar was also one of the four witches and wizards to establish the world-famous wizarding school of Hogwarts. And yet, despite his impressive intellect and abilities, Salazar Slytherin has arguably the worst reputation of any of the four founders - with even darker secrets.

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