is in the middle of the transfiguration class with Professor Macgonagall, the old woman was writing on the blackboard with the help of her wand while explaining the subject

Meanwhile, Sirius, James, Remus and Peter were doing everything, but paying attention to Macgonagall's explanation, Sirius was spinning his wand between his fingers with a bored expression, James leaning his head on his hand, Looking at a fixed point on the classroom, Peter was trying really hard not to sleep and Remus was sketching on his parchment

Macgonagall: So, who can tell me who invented the Depulso spell?

Said the Professor, eyeing the class, Looking for any raised hands