When Harry finally became the headmaster of Hallwarts, he gradually aged and finally died.
Wait until he opens his eyes.
There are two more parents named Slytherin.
And his name is: Salazar Slytherin.
Then, with his undying love for the Lion Ancestor, he returned to a thousand years later.
But he is no longer Harry Potter.
Who is Harry now?
CP: Palace V, mostly deputy CPs.