Novel info
Dark Child. (Harry Potter)

Most would expect that the mudblood with ragged clothes and a easy going smile would stay in place, most certanly not getting into slytherin of all things.
Most would often expect that a child, regardless of blood status, wouldn't know a dark curse.
Lucky Calum, he's just versatile with darker magic than simple curses.
AN: I took the cover from pinterest, it is not my own