Mordred

Mordred Cosmos Riddle-Black reminds Dumbledore of Tom Riddle but has the wild look in his eyes as Sirius Black.
When the sorting hat shouts King Slytherin sorting him into Slytherin as the king. They hadn't had a proper king for 50 years the last king was his father Tom Marvolo Riddle.
And just like his father he is short tempered and like his mother he has the wild instinct to kill.
Those aren't great together. Expecally when the Gryffindors reach his last nerve.
What will happen?