Nigel walked in and noticed a maybe student sitting in Scabior's seat telling them to sit down. Either that kid was very brave or it was Scabior. Maybe a potion or spell went wrong. Who knows. But then he sees Scabior behind the kid

"Hello, Professor and umm... Hello"

Nigel did not know his name so he just said hello and sat down at a empty desk. This lesson was beginning to look interesting already.