SALAZAR SLYTHERIN

"I'm a Parselmouth," Salazar answered, speaking the words more confidently than he ever had before. "It's a very rare ability that runs in my family. We can speak to snakes, like yourself."

"What a gift!" cried the snake. "What a wonderful, wonderful gift!"

Salazar wondered if he should tell the snake that he thought it to be a curse.

( founder's era - post battle of hogwarts )